Boardy3 r91

Commits

d1f1350...ea1292b

• Add sqlalchemy type annotations (@disbxys)
• Fix delete_all_images not deleting image files (@disbxys)
• Add more tests for image (@disbxys)
• Begin adding unittests for Tag (@disbxys)
• Make delete_tags() raise exception if given invalid tag id (@disbxys)
• No longer require arg to be passed in search_tags() (@disbxys)
• Add more tests for tags (@disbxys)