Multiple Dex Support

 - CS fixes
 - added decode support for multiple dexes
 - decoded to smali_[dex name]
Multiple Dex Support - part 2

 - CS fixes
 - adds support for building multiple dex
 - prevents extra dex from being unknown and extra dex
 - adds unit-test
[dexlib2] allow disassemble of apks with non classes.dex files
Multiple Dex Support - part 3

 - dexlib2 handles non classes.dex
 - cleaned up functions
 - cs fixes
Multiple Dex Support - part 4

 - add unit tests
 - minor cs fixes
Merge pull request #90 from iBotPeaches/multiple_dex

Multiple Dex Support