Updated the requirement of phpunit/phpunit to ~4.0
Verify extension provided when generating ShortUrls
Updated dependencies
Merge pull request #281 from christeredvartsen/phpunit-upgrade

Upgraded PHPUnit
Initial commit of robots.txt and humans.txt
Added Mats
Added André and Espen
Merge pull request #282 from christeredvartsen/humans-and-robots

Add robots.txt and humans.txt
Merge branch 'shorturl-verify-extension' of https://github.com/rexxars/imbo into rexxars-shorturl-verify-extension
Adds x-jpeg, x-png and x-gif as accepted mimetypes.

These mimetypes may be returned by ImageMagick on Windows when
calling ->getMimeType() on an imagick object.
Added test case and updated ChangeLog