basic EM algorithm

- cluster alphabets in consonants and vowels
added Maximum Margin code

-unusable for now
- used for an assignment; need changes to make it generic
added Tokenizer
added stemmer package

- code till step 5
- yet to test code
completed Porter Stemmer code

- yet to run and test and code
- the code may contain compile time errors
solved a bug
Merge remote-tracking branch 'origin/test1'