PSR-2 fixes
Merge pull request #314 from GrahamCampbell/psr-2

PSR-2 Fixes
Merge and Interface refactoring
Modified all the tests to reflect the new interface. Also refactored the EventableFilesystem to be an extension instead of a wrapper.
Fixed dropbox rename and copy return type
Corrected Dropbox normalizer docblock
Corrected Filsystem specs
Corrected rename and copy assertions
Tested Copy::copy failing scenario
Corrected Config change in spec
Delete archive.zip
Merge pull request #315 from GrahamCampbell/patch-1

Delete archive.zip
Updated changelog for the interface refactoring.
Removed typo from changelog
Removed gittip badge, it only brought me down while generating no support whatsoever.