Added symfony/Process component, created a ProcessFactory and implemented this in targz consumer
Migrated Analysis\\PHPLoc consumer to Symfony Process component
Small (coding related) tweaks for Extract\\Targz consumer
Migrated Analysis\\PDepend consumer to Symfony Process component
Migrated Download\\Git consumer to Symfony Process component
Migrated Analysis\\GithubLinguist consumer to Symfony Process component
Replaced implementation of ProcessFactory to use ProcessBuilder
Forgot command in ProcessFactory
Migrated CVSAnaly to Symfony Process component
Removed executeCommand and getEnvironmentVarsCommandPart from ConsumerAbstract
Merge branch 'symfony-process'

Migrated all processes to symfony process component and upgraded composer packages