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
fixed issues with coverage and pylint results
Merge pull request #361 from hleeldc/test2

fixed issues with coverage and pylint results