Update composer.json sample to use latest version
Add branch alias 0.6-dev
Fix branch alias
Update 0.5.0 release, add 0.6.0
Compile recent version of imagemagick as the one provided is quite old
Move travis environment setup logic to travis configuration file
Removing RakeFile as pear and phar packages have been deprecated
Merge pull request #235 from romainneutron/build-lib-versions

Remove RakeFile, use travis file for customized build environments
Add ColorSpace and ICC profiles support
Add WebOptimization filter
Add color section to documentation, update to latest color API
Add missing copyright file headers
Fix documentation
Fix GD layers
Fix GD layers
Fix layers Tests
Fix tests and CS after rebase
Add link to adobe EULA license for bundled ICC profiles
Update changelog
Move color and palette tests to Imagine\Test namespace