Merge pull request #166 from thotypous/master

Fix multiple crash bugs on GestureDector (with double-finger) and Reader...
fix Geom:combine when sizeof rect is zero
fix missing underline in config window
add regional screen refresh support
and waveform mode can be specified when calling screen refresh
use WAVEFORM_MODE_A2 when scrolling page
use regional update when selecting config panels
use regional update when displaying dict windows
fix regional screen refresh
Merge pull request #167 from chrox/refresh_mode

add regional screen refresh support
fix regional screen refresh
Merge pull request #168 from chrox/refresh_mode

fix regional screen refresh