a FeatureMap is now also being built and persisted to disk. + other
enhancements

>   at some cases the plugin file name was being converted to lower
case, this was messing some things up. Chnaged to not convert to lower
case.

> Parsing.Constants now has support for features

> feature file extract generation now based on Constants interface
literals

>  the object persistence moved to Utils from BundleAnalyser and used at
multiple places now.
javadoc update