Updated the package structure.
Cleaned up plotting and added testcases to verify
Updated plot utility - corrected frame location and size
Added smaple dataset files and corresponding read utilities.
Moved the Text file Utility to test
Added DataStructures for real values.
Added toString() to classes
Added clustering wrapper ..
initial place holders for text parsing classes
Added Lemmatizer code
Methods for finding stopwords(need input as list of maps)
Mapsforallstrings(need input as list of maps) 
and mapforlistofstrings(need input as listofstrings).
Made some changes to previous code
 Mostly this will be the final code for stopwords and word count
core : added learnr-hadoop Module