Merge pull request #123 from clintbellanger/master

merge from master
Fix background tile rendering when animated tiles are off
Merge pull request #808 from dorkster/animated_tiles

Fix background tile rendering when animated tiles are off
enemy convert_status
initialise convert_status
Merge pull request #811 from RyanDansie/enemy_convert_set_status

convert_status for enemies
Remove superflous 'last_seen' variable in StatBlock
Merge pull request #815 from stefanbeller/remvar

Remove superflous 'last_seen' variable in StatBlock