experiment.meta: fixes for $input-parse-relaxer
SoftSourceSyntacticConstraintsFeature: improved efficiency
Add Moses::Syntax::Manager class

Sits between Moses::BaseManager and S2T::Manager, F2S::Manager, etc.
Merge branch 'master' into t2s + use Syntax::Manager for T2S/F2S

Conflicts:
	moses/Syntax/S2T/Manager-inl.h