Fixed issue #329. User bookmark count works with only date now
Changes done
Tests cleaned. Dates changed to string
Add ability for user to delete all their bmarks.

- Added model test for deleting all bookmarks
- Added view tests for delete_all_bookmarks
Only require date for user stats.

- Fixes issue #329.
Make sure export sends bookmarks w/o tags.

- Fixes #331
explicitly create python2 virtualenv
Merge pull request #336 from dyladan/makeenv

explicitly create python2 virtualenv
Add user stats page to display bookmark counts.
fix url alignment on edit page
fixed : bookmark count for users incremented
Made testcases pytest compatible
Merge remote-tracking branch 'pr/341' into qa-counts
Make sure we query per user for urls
Another attempt at fixing the username issue
Merge branch 'develop' of https://github.com/bookieio/Bookie into develop

Conflicts:
	bookie/models/stats.py