update CHANGELOG with MmCorpus fix
print a warning when ppl try to do corpus.save() instead of serialize()
Windows fix: treat word2vec files as binary
minor docs improvements
remove tmp_dir in Mallet wrapper, fixes #184
Return topics in the right order

Passing -1 or n, where n >= num_of_topics to show_topics() should return the topics in the right order. It currently returns the topics in the reverse order which is difficult to reason about.
Merge pull request #188 from fayimora/patch-1

Return topics in the right order
update CHANGELOG
add topic printing to LdaMallet
minor doc fix
fix LdaMallet bug where model[vec] returned a corpus
* now a vector on input returns a vector on output as expected
add LdaMallet unit tests
add Similarity method for cleanup in unittests, fixes #182
revert py3k change that breaks dict mixin
up version: 0.9.1