Changed how frequency distribution gets cleaned after script, changed
script to read tokens from a tokenizer keyValueResult and provide a
frequency distribution
Fixed number formmat on empty string
Merge branch 'peteFreq' into dev

Conflicts:
	NLTKBinaryPlugin/src/nltkbinaryplugin/NLTKWrapper.java
	NLTKBinaryPlugin/virtualenv/LinGUIne/Scripts/NLTKFrequencyDistribution.py