Optimized update_scent for less map::move_cost calls
Additional optimization to update_scent
Saved current ter_id in map::drawsq for less ter(x,y) calls
Merge branch 'opti' of https://github.com/tasetase/DDAtase into opti
Reverted bad optimization
Merge pull request #203 from tasetase/opti

Trivial minor optimizations