Update Gradle Distribution and Exercise References, Correct Errors and Spelling - Fixes #72

1.01-Exercise-RunYourFirstTask/gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.7-bin.zip

1.02-Exercise-InstallGradle/build.gradle

@@ -11,6 +11,8 @@ installation of Gradle. First make sure you have an installation of by running
 
 The output should be something like:
 
+(java version may be different)
+
     java version "1.8.0_112"
     Java(TM) SE Runtime Environment (build 1.8.0_112-b16)
     Java HotSpot(TM) 64-Bit Server VM (build 25.112-b16, mixed mode)
@@ -48,9 +50,9 @@ terminal. Note that you may need to change the version number on the first and
 third lines. Note that you may need to run the following command
 with `sudo` out in front.
 
-unzip ~/Downloads/gradle-3.3-all.zip -d /usr/local/gradle/ &&\
+unzip ~/Downloads/gradle-4.7-all.zip -d /usr/local/gradle/ &&\
 echo '# Adding Gradle to system path
-export GRADLE_HOME=/usr/local/gradle/gradle-3.3
+export GRADLE_HOME=/usr/local/gradle/gradle-4.7
 PATH=$GRADLE_HOME/bin:$PATH
 export PATH' >> ~/.bash_profile &&\
 source ~/.bash_profile
@@ -60,14 +62,14 @@ source ~/.bash_profile
 First, head over to https://gradle.org/gradle-download/, and download the latest
 version of Gradle. Note that we want the complete distribution. Next, we'll
 unzip Gradle and move it to where we want it to live. Our recommendation is in
-`C:\gradle-3.3`.
+`C:\gradle-4.7`.
 
 To tell Windows where to find Gradle, we need to add an environment variable.
 Navigate to the Control Panel > System > Advanced system settings > Advanced >
 Environment Variables... > System variables > New...
 
 Set the variable name to: GRADLE_HOME Set the variable value to the location
-you unzipped Gradle if you followed our suggestion it should be: C:\gradle-3.3
+you unzipped Gradle if you followed our suggestion it should be: C:\gradle-4.7
 
 Then edit the PATH user variable by appending: ;%GRADLE_HOME%\bin\
 
@@ -118,6 +120,8 @@ Before following these instructions, check to make sure you haven't already
 installed Java by running `java -version`. If the output is something like the
 following:
 
+(java version may be different)
+
     java version "1.8.0_112"
     Java(TM) SE Runtime Environment (build 1.8.0_112-b16)
     Java HotSpot(TM) 64-Bit Server VM (build 25.112-b16, mixed mode)

1.05-Exercise-ExperimentWithGroovy/build.gradle

@@ -1,14 +1,6 @@
 /*
 
-Welcome to the solutions to the Groovy Playground exercise! You can run these
-tasks by telling Gradle to use this build script, instead of the default
-build.gradle. To run the task below, use:
-
-    $ gradle -b solution.gradle stringsAndTypes
-
-or, more compactly
-
-    $ gradle -b solution.gradle sAT
+Welcome to the to the Groovy Playground exercise! Complete the TODOs below.
 
 */
 

4.02-Exercise-CreateAJavaLibrary/exercise.txt

@@ -3,9 +3,10 @@ app, and not one, but two Java libraries!
 
 1. Create a new project in Android Studio, using all the defaults.
 
-2. Manually add a Java module with a class called JokeSmith with a getJoke()
-method. Feel free to supply a funny joke, or just a debug method, if
-you're no fun. Remember to set sourceCompatibility = 1.7, so your library is
+2. Manually add a Java module with a class called JokeSmith with a tellAHandCraftedJoke()
+method inside a package so that the class can be imported in your MainActivityFragment.
+Feel free to supply a funny joke, or just a debug method, if you're no fun. 
+Remember to set sourceCompatibility = 1.7, so your library is
 usable on Android. This line should be added to the build.gradle file of the
 module.
 
@@ -25,10 +26,10 @@ Note that the wizard adds JokeWizard to your settings.gradle
 
 7. Declare a project dependency between JokeWizard and JokeSmith
 
-8. Implement a getJoke() method on JokeWizard that uses the getJoke() method
+8. Implement a tellAWizardJoke() method on JokeWizard that uses the tellAHandCraftedJoke() method
 on JokeSmith.
 
-9. Add a project dependence between your app and JokeWizard
+9. Add a project dependency between your app and JokeWizard
 
 9. Add another text view to MainActivityFragment and populate it with a joke
 from JokeWizard.

4.06-Exercise-ConfigureSigning/app/build.gradle

@@ -1,10 +1,12 @@
 /*
 
-In this exercise you'll configure signing and deploy a release build.
+In this exercise you'll configure signing and deploying a release build.
 
 1. Use the Build > Generate Signed APK dialog to create a new keystore (or you can use a previously generated keystore).
 
-2. Create a signing configuration using your keystore. You can either use the Module Settings dialog (which you can access by right clicking on the app folder), or by manually configuring the signingConfigs block. Make sure the keystore is included in your project directory and is referenced via a
+2. Create a signing configuration using your keystore. You can either use the Module Settings dialog (which you can access by right clicking on the app folder), 
+or by manually configuring the signingConfigs block. Make sure the keystore is included in your project directory and is referenced via a config block
+in your app's build.gradle.
 
 http://tools.android.com/tech-docs/new-build-system/user-guide#TOC-Signing-Configurations