adjust the scope of a few uSound variables and functions

Merge

Convert namespace from list into map in preparation for implementation of overloaded functions support. Greatly improve speed of rendering as a side effect (parse + render time reduced from 5:20 to 0:20)

some tweaks/fixes/etc to the map preview and reload stuff also fixed an old bug of a "stuck random/drawn map preview" when changing maps quickly

visually indicate when map preview generation is in progress.

HAPPY 7000th COMMIT HEDGEWARS - enforce strong typechecking for strings - disable embedded fpc exceptions (binary size savings of ~5k) - add stack check in debug mode

add DLC button to net game room

+ display lack of map in a nice way, don't generate bogus preview in the background * improve map selection behavior in online mode, so that players can load a missing map and have it correctly selected after pressing F5 without any rejoin, map-reselection. also doesn't cause "different maps generated" anymore if map is missing, instead the person lacking the map gets "invalid genmap" and drops out of game immediatly

Get rid of overloaded functions in uRenderUtils

merge

small tweaks/fixes to room list header saving and restore... setModel should be really done in the constructor of the page IMO btw

Switch effects to longint for convenience of tracking ice states. I could add a new Hedgehog value, but since we have this effects list being all useless as booleans anyway...