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.
FTP deletedir no longer assumes an ordered list of directories
Avoid that the FTP deleteDir throws exceptions