Turn autocompletion args into Symfony params.
Escape shell arguments properly
Fixed an error in autocompletion JSON file name.
Fixed an error in autocompletion dir creation.
Fixed error messages.
Minor fix.
Merge branch 'autocompletion' of github.com:codebendercc/compiler into autocompletion

Conflicts:
	Symfony/src/Codebender/CompilerBundle/Handler/CompilerHandler.php