Rewrite font builder tool to be much simpler and to support more text
effects.
Change GUI to use new set of fonts.
Switch font textures from TGA to PNG so they're easier for the font
builder to create.
Support RGBA font textures (for e.g. stroked text).
Greatly improve text rendering performance by using vertex arrays.
Fix rendering code leaving vertex buffers bound.
Add 'clip' property to GUI text objects, to disable clipping when
rendering.
Delete part of unused console function registration system.
This was SVN commit r7595.
Add an obvious pre-release warning to the menu.
Report the build's svn_revision on the menu.
Fix exiting from sim2 session.
Make the in-game dev options a bit prettier.
This was SVN commit r7400.
Add various GUI pieces (exit button, resource counts, unit details).
Clean up implementation of button panels.
Split some content out of 'common' and into page-specific files.
Delete some obsolete content.
This was SVN commit r7337.
