Added filters for issues,events,stories
Modified /issues filters to deep search on an issue's project
Added tests for issues, stories and events query filters
Fixed issues/labels search to do an intersection search when given more than 1 label
Updated tests.py to reflect new functionality
Added failing test for cascading deletes
Modified models to do cascading deletes
Fixed run_update_test.py
Beginning migrations.
migration docs
Merge pull request #123 from chrisrodz/issue-122

Added query filters to stories, events and issues. Closes #122
Merge pull request #124 from chrisrodz/fix-labels-search

Fix labels search
Merge branch 'master' into fix-cascading-delete

Conflicts:
	tests.py
Merge pull request #125 from chrisrodz/fix-cascading-delete

Fix cascading delete