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
Add grayscale fixture
Add grayscale palette
Add grayscale ICC profile
Add grayscale colorspace support to imagick
Add unit tests for grayscale support
Add note about colorspaces support
Fix unit tests and CS