Preliminary addition of remaining features

-Added support for missing ViewController types in storyboards.
-Added support for nib/Cell processing and generation
-Added support for xcasset parsing and identifier generation
-Reorganized generated folder structure

Added support for ScrollViews and StackViews

0.7.0

Adding proper support for ScrollViews and StackViews

Reliability improvements

XML parsing is now much more sturdy, resulting in a more consistent generation of Segue information.

Fixes and better support

-Added support for embedded segues (namely in containerViews)
-Added embedded info.plist to SwiftyIBTool to allow for better tool-management
-Added build flag to get the version (-v) for SwiftyIBTool and SwiftyIBBuild.sh
-Updated readme script to include rebuilding when there's a newer version.

Bug fixes

v0.5.1

Added support for `UITabBarController` and fixed issue with storyboar…