fix for laser misfiring: http://redmine.laoslaser.org/boards/1/topics/747
Make cancel button working using MODI2C, http://redmine.laoslaser.org/boards/3/topics/833
Fix to make engrave speed setting working

http://redmine.laoslaser.org/boards/3/topics/841?r=847
New binary

- Fix to make engrave speed setting working
- Make cancel button working using MODI2C
merage master
merge master