ganon version 0.1.3

• travis compilation test with gcc7, gcc8, gcc9, clang-7 and clang-8 thanks to @benvenutti
• path to the binaries and scripts with shutil.which
• --max-bloom-size option to estimate best --bin-length based on user input size
• auxiliary Time is now StopClock
• python wrapper integrated to the project folders
• first tests added for the python code (unit and integration)
• osx complete support
• integration taxsbp 0.1.2
• do not force sse4_2