Throw Exception early if using --forks and missing spork library
Throw Exception early if using --forks and missing spork library

jandevani/AsseticBundle,nexylan/AsseticBundle,Soullivaneuh/AsseticBundle,robertfausk/AsseticBundle,xabbuh/AsseticBundle,symfony/AsseticBundle,javiereguiluz/assetic-bundle,ThatCheck/AsseticBundle,jandevani/AsseticBundle,nexylan/AsseticBundle,xabbuh/AsseticBundle,shieldo/AsseticBundle,taueres/AsseticBundle,artursvonda/AsseticBundle,Soullivaneuh/AsseticBundle,symfony/assetic-bundle,ThatCheck/AsseticBundle,stof/AsseticBundle,symfony/assetic-bundle,artursvonda/AsseticBundle,shieldo/AsseticBundle,taueres/AsseticBundle,robertfausk/AsseticBundle,Soullivaneuh/AsseticBundle,javiereguiluz/assetic-bundle,peterkokot/AsseticBundle,symfony/AsseticBundle,nexylan/AsseticBundle,peterkokot/AsseticBundle,stof/AsseticBundle,webmozart/AsseticBundle,ThatCheck/AsseticBundle,jandevani/AsseticBundle,robertfausk/AsseticBundle,stof/AsseticBundle,webmozart/AsseticBundle,symfony/assetic-bundle,shieldo/AsseticBundle,taueres/AsseticBundle,javiereguiluz/assetic-bundle,symfony/AsseticBundle,artursvonda/AsseticBundle