test for empty DictionaryProbDist before normalization, to prevent dividy-by-zero error; resolves issue 309
Update nltk/tag/sequential.py

Remove need to pass train argument to BigramTagger.__init__() as in other NGramTagger-Classes
Merge pull request #356 from yanlend/patch-1

Update nltk/tag/sequential.py
added files and fixed tox.ini for jenkins setup
use the default text encoding instead of gzip for interacting with megam; also don't compress the training file since megam is just going to decompress it in a moment anyway
Merge pull request #357 from alexrudnick/megam_unicode_no_gzip

fix interface to megam maxent classifier!
Update nltk/downloader.py

Fixed bug that prevented downloads from being shown because comparisons weren't implemented.
Update nltk/internals.py

object.__new__() cannot take any extra parameters.
Merge pull request #358 from BrucePHill/master

Bugfix for downloader sorting
Fix interface to the Stanford tagger: in both Python 2 and 3 cases, make sure we're writing the temporary file in the appropriate encoding, then likewise decoding the tagger output.
fixed issues with coverage and pylint results
simplifications suggested by @heatherleaf
Merge pull request #361 from hleeldc/test2

fixed issues with coverage and pylint results
make encoding more explicit (and not default to None)
Merge pull request #360 from alexrudnick/fix_stanford_unicode

Fix interface to the Stanford tagger so it works on Python 2 and 3
Update README.md
Clarify comment (issue #362)
Merge pull request #363 from jnothman/patch-3

Clarify comment (issue #362)