Update DefaultFeatureGeneratorConcatFIGER.java

a bug on getting the link id of the arg1
fixed a couple of bugs for IndepFIGER feature generation
Merge branch 'master' of github.com:xiaoling/MultirSystem
Merge remote-tracking branch 'xiao/master' into NELArgumentIdentificationEdit

Conflicts:
	src/main/java/edu/washington/multir/featuregeneration/DefaultFeatureGeneratorIndepFIGER.java