e7a35ba: puzzles: dynamic text size via custom font pack
Up to now, we'd just ignore whatever font size the puzzle asked for, and instead just go with either the UI font or system font regardless of their size, which led to some horrible-looking puzzles. This patch adds the ability to automatically load fonts of the proper size when they are available, which makes text-based puzzles such as Pattern and Slant function correctly with any UI font.
The font pack, which should be extracted to the system-wide fonts directory consists of 3 small bitmap fonts from 7px to 10px and then anti-aliased Deja Vu fonts from 10px to 36px. It is available in the source tree (apps/plugins/puzzles/fonts.zip), or from