Update README.md

Changed the name of the corpusCreate function.
Merge branch 'dev'
updated namespace for latest built
Stemming function corrected

Needed to lapply() wordStem, not to run this on a list (which
incorrectly coerced the input list to a character vector).

Also changed the return class from wfm to data.frame when
stopwords=TRUE.
Updated and documented collocations().

Formerly this was named bigrams() and was not in the NAMESPACE.
merging
removing testing generated files
Merge branch 'dev'
merging
mergint
Added a new corpus creation example

Also removed deprecated function name help files for some of the corpus
handling functions.
Updated to work with Wordstat imports
Updated some documentation and deleted removed functions.
tidied up clean.R
minor change to documentation for clean.R
no @ in clean.Rd
Minor documentation changes