Merge pull request #10 from skwi/master

Fix in ImageWorkshop "ResizeInPixel" usage
Update README.md
sybio/image-workshop version specification
Form type for images
'original' parameter copy the plain image without manipulating it
max_size, max_height, max_width options added
Small fix in twig extension
Fix in resize by MAX
Fix an invalid filepath if entity property is null or empty
Fix composer.json : homepage invalid URL format
Add unit tests with Atoum
Add travis configuration
Merge pull request #12 from jdecool/twig-null-entity

Fix an invalid filepath if entity property is null or empty
Fix composer dependencies
Merge pull request #13 from jdecool/fix-composer-dependencies

Fix composer dependencies
ImageType refresh cache on image display
Update caching on image display (twig extension)
Stylefix
Update composer for PropertyAccessor compatibility

Version 1.0 of the bundle still provides compatibility with older versions of symony
README updated to add explanation about the 2.5 compatibility