Added ajax autocomplete for the directories dropdown in the policy view

tnc-ba/strongTNC#134
Added function to import swid tags from the workitems result field in the DB

Also, there is now a manage.py command to import swid tags from file
(tnc-ba/strongTNC#133)
Added trusted flag to device
Removed os.path.join to ensure windows compatibility
Configured urls for swid app
Created regid template
Implemented SWID inventory view
Disabled compiler optimizations on Travis CI
Fixed issue128 merge bug
Added ajax based paging