* evas/src/lib/engines/common/evas_font.h,
* evas/src/lib/engines/common/evas_font_draw.c,
* evas/src/lib/engines/common/evas_font_load.c,
* evas/src/lib/engines/common/evas_font_query.c: Add cache for font kerning.
This patch give something around 2% for all tests around text in expedite,
except for Textblock Intl where it give a 3 times boost.
Regarding text rendering speed, something is strange when used by evas_pipe.
All tests using Styles are around 40% faster without evas_pipe. 30% faster
for Text Change. But Text Basic 7% slower. So it should be possible to have
faster rendering when using evas_pipe for font rendering.
SVN revision: 38993