Merge pull request #66 from EuKov/master

composer/bin/coveralls chmod +x made
Include source directory in exception message.
Merge pull request #67 from bartfeenstra/master

Include source directory in exception message.
[Composer] Fix dev dependencies
[Composer] Allow to install guzzle 2.7.* in order to be compliant with Symfony 2.0
Merge pull request #68 from egeloen/symfony-compatibility

Symfony 2.0 compatibility