add missing cython files to MANIFEST.in
re #197: fix typo
Fixed TypeError and standardized `num_topics` argument in `LdaModel.show_topics`

Line 678 of gensim/models/ldamodel.py threw a TypeError under Python3+, because the single slash division syntax returns floats, which cannot be used as indices. I changed this line to use floor division instead. This does not break Python2 compatibility.

Also solved Issue #115 by changing the `topics` argument of `LdaModel.show_topics` method to `num_topics`.
use miniconda in travis CI
create conda env in travis CI
changed `topn` argument to `num_words` 

This brings the `LdaModel.print_topics` and `LdaModel.show_topics` in line with the equivalent `LsiModel` methods.
improve matutils docs
increase max word2vec sentence length to 10k
* was: max 1k tokens per sentence (rest is ignored)
improve docs
bump version: 0.10.0
Merge branch 'release-0.10.0'
Merge branch 'release-0.10.0' into develop
Merge remote-tracking branch 'upstream/develop' into develop
Merge remote-tracking branch 'upstream/master'