Fix some trivial UTF-8 issues.

fixes ticket:3884
refs ticket:4259
Add missing files for distribution

refs ticket:4259
Correct oversight of not including original bison/flex files for distribution.

patch by clueless
closes ticket:4151
refs ticket:4259
Remove old, inaccurate credits screen. Will replace as soon as forum thread http://forums.wz2100.net/viewtopic.php?f=33&t=11885 picks some winners.

refs ticket:4259
Create a new font size of medium since large was too large for some languages, and regular was too small to read at higher resolutions.

refs ticket:4259
Introduce a rudimentary way to check if they have the latest version of the game. (Part 1)

refs ticket:4257
refs ticket:4259
Use our configdir (which is the only directory WZ should ever write to) for all crash handlers now.

Fixes ticket:3885
refs ticket:4259
Fix display name(s) to update correctly.

refs ticket:4259
Notify host & client of a new game version when available. refs ticket:4257 refs ticket:4259