make gensim run on python3
* targeting 3.3+
bring py3k to the deprecated preprocessing module too
add py3.3 to travis
py2.6 & py3.3 build fixes
try to make travis tests work on py3.3
fix hash dictionary py3
fix py3k print statement
add py3.4 to travis
remove py3.4 from travis CI
* travis not ready yet: https://github.com/travis-ci/travis-ci/issues/1989
* add back when travis fixes that issue
Merge pull request #196 from piskvorky/py3k

Py3k
unbundle six
build an optional gensim_addons-package
if Cython is present during installation