load the girder.png of a theme a maximum of 1 times (minimum of 0), instead of once per generated bridge
clean up image loading a bit. gets rid of useless "Passed NULL data source" or PhysFS file not found errors
fix for "Unexpected semi-colons in conditional" issue, as reported by YuGiOhJCJ
(see http://www.hedgewars.org/node/5860 )
big thanks to burp for helping to identify and fix this issue
theme configurable sudden death music. untested
escape info message arguments, fixes
issue #801: Frontend parses INFO command output as html
collision indicator on failed girder placement (especially useful with rubberband I guess). still needs some tweaks but I am going to bed now :P