Merge pull request #46 from emsiepopples/master

Small changes to lda script and create_dic.py
Some minor changes
Merge pull request #47 from elenagr/master

Some minor changes
Change name of customized dictionary to match corpus name
Merge pull request #48 from elenagr/master

Change name of customized dictionary to match corpus name
Finished LDA analysis code
Added gap statistic testing.  Not sure if I've uncommented all the main lines of text that should be there