2013-01-19 - version 0.1:
   - Initial release
2013-03-04 - version 0.1.1:
   - Added URLEncode for non-ascii track strings
   - Fixed parseTweets function to allow new coordinates structure in API 1.1
2013-10-07 - version 0.2:
   - Modified parseTweets function to make it faster and more complete
   - Removed user/password http authentication
   - Filter by language
   - Better information messages (tweets and not kb)
   - Introduced option to close connection after a specified number of tweets
   - Other minor bugs
2013-11-30 - version 0.2.1:
   - Fixed bug in parseTweets function
   - More informative tweet counts in filterStream
2013-01-05 - version 0.3:
   - New CRAN release
2013-01-07 - version 0.3.1:
   - Fixed dependencies