MapRenderer: Do not call map_to_screen so often for Orthogonal maps.

Fixes #326 for orthogonal maps.
Add option for equipment to apply when transformed

In response to #448

With this, we can now use `keep_equipment=true` for flare-game's Stealth
power. The default value for this false to retain the old behavior and
avoid breakage with other games.
Increase the size of the dot showing the hero on the minimap.
Don't invalidate iterators again!
Remove cppcheck warnings.
Merge pull request #459 from stefanbeller/largerheroonminimap

Increase the size of the dot showing the hero on the minimap.
Merge pull request #458 from dorkster/bugfixes

Add option for equipment to apply when transformed
Merge pull request #457 from stefanbeller/speeduprender

MapRenderer: Do not call map_to_screen so often for Orthogonal maps.
Merge pull request #460 from igorko/master

Don't invalidate iterators again!
Update engine.pot file.
Merge pull request #462 from stefanbeller/master

Remove cppcheck warnings, update port file.
Recreate the actual *.po files as well. Add a script to do it automatically.
Merge pull request #464 from stefanbeller/master

Recreate the actual *.po files as well. Add a script to do it automatically.
update gitignore file
Update engine.fr.po

Update french translation of the engine
Merge pull request #466 from cjsthompson/master

Update the french translation of the engine
Merge pull request #465 from stefanbeller/master

Add some temporary files for benchmarking to gitignore.