Add feature #11
Fix _total_rows in the meta table
replace all of the instances of phile with File.
travis ci: Use the latest version of Disco for builds.

This will let us catch the errors sooner.
Merge pull request #47 from pooya/develop

small cleanups
Fix the BooleanIX, handle the key missing case
Fix issue #50
Make bit type stick to 0 or 1 explicitly
Adding purge_local flag to insert command
Merge pull request #51 from oldmantaiter/develop

Adding purge_local flag to insert command
Add filter functionality for preprocess in insert()
Fix purge_local
Revert the commit 922dc9f7e
Add max_cores, profile, and auto_purge
Merge branch 'release-0.2.5' into develop
Add #48 - make "limit" run faster
Add column function execution for the project columns
Remove query.py
Add h_combine aggregate function
Fix the h_combine to handle the "None" case