Changing staticmethods to classmethods
Adding exists classmethod to the base class
Merge pull request #64 from josenavas/exists

Add exists classmethod
More db changes
add investigation object skeleton
Add eq and ne checks for user
added equality check to base class
change _table name
change sample_id to varchar
Merge pull request #66 from squirrelo/skeletons

Skeletons
Merge remote-tracking branch 'upstream/master' into addstudy
fix base eq check and add data skeleton
Remove extra check
Merge branch 'master' of github.com:biocore/qiita into moredb
Merge pull request #65 from squirrelo/moredb

More db changes
Merge branch 'master' of github.com:biocore/qiita into addstudy
populate study_preprocessed_data table for tests
Merge pull request #68 from squirrelo/testdata

populate study_preprocessed_data table for tests
more test code and bugfixes
break up if into two statements