Merge pull request #4 from 7footmoustache/master

Enable usage of SparseForm
Merge pull request #5 from 7footmoustache/master

Fixes open ended range searching on Integers
Dismilation window, fix bug in search model, dump stupid ordered dict.
Merge branch 'master' of github.com:michelp/xodb
Bail early if exact simhash has been seen
fix stupid expand