Updated .gitignore
Added self-sufficient export method; fixed some inconsistencies in parse_tsv;
Uses export now
Moved parse_ftvec_templ inside FeatureTemplate; User defined functions are added to the instance and not to the class; Fixed index error in most of the feature methods; Simplified the way CRFSTagger uses the confoguration parameter -- took out many of the attributes as properties directly accessing `cfg`;
Added path expansion function for the CRFSTagger config object (ConfigParser).
Added tests for ftex and utils (incomplete)