fixed bug in as.dfm()
some arabic stemming to clean.R
removed austin functions from MCMCPoisson1d
deactivated wordstemArabic for now
working on Jar installation problems
improvements to sentence segmentation.
various fixes to make check finish, tests for Matrix classing, reversed and tested clean/tokenize order
added functions for social media data

new functions: getTimeline (Twitter REST API) and getFBpage (Facebook
REST API), and corpus function for FB