0.9.9 Localization update

Nearly all of MGEXEgui is localizable. Added code for title, dialog and comboboxes into the localization framework.

Added preliminary French localization data.

MGEXEgui upgraded to .NET 3.5.

Improvements to the shader editor and shader preview. It now reads the depth texture properly and sets some basic variables to simulate being in game. Doesn't cover all variables yet.

Distant statics list parser now treats # comments as normal instead of giving a deprecation warning.

Antialiasing dropdown list is reduced to the useful values.

Toggling per-pixel lighting shader beta option automatically sets the intended lighting coefficients.

Added log viewer to MGEXEgui settings tab.

Fixed some strange sample offsets in the world texture generator weight filtering.

Removed that bizzare broken RGB::operator+.