Updated composer with correct usage of require dev. Ignore temp files.
Green: simple square image test.
Separate tests (home page, create images). New image formats: png and gif. Green.
Refactor tests. New test for urls without image format.
Use the default error handler.
Url parameters must be case insensitive
Testing wrong urls.
Limit min/max size of images
Improve directory/file structure (more like fabpot's silex skeleton)
small refactor; typo fixing too.
BIg refactor: new Request class for translate url parameters to image parameters.