A few fixed to make the lib work better with current Swift

No changes to the library itself.

Fixing memory leak. buffer needs to be deallocated on builder object destruction

Fixing travis osx_image

Removing not needed files.

Switching to Swift based fbsCG

fixing warnings

changing code generator to respect latest rename refactoring

Merge pull request #80 from hassila/master

Final Swift 3 API cleanup: FlatBuffersBuildConfig -> FlatBuffersBuilderOptions, numOfProperties -> withPropertyCount

added updated Reader in code generator and created test to make sure that it will not happen again.

Update README.md

complete overhaul of vectors

code generator which implements all changes from https://github.com/mzaks/FlatBuffersSwift/issues/55

improving data loading