updates branch alias
fixes deps
Fixed the composer requirements

This adds an upper bound on the JMSDiExtraBundle and let the
1.3.0-alpha version of JMSDiExtraBundle match the requirement
Merge pull request #275 from stof/patch-2

Fixed the composer requirements
updates bundle's tests for 0.12 version
Fixed serializer library reference in PHP templating helper.
Merge pull request #277 from rafalwrzeszcz/feature/php-helper-fix

Fixed serializer library reference in PHP templating helper.
Merge remote-tracking branch 'upstream/master'