UPDATE: Dwell (G82) and Peck drilling (G83) cycles now supported by #CCDCC .js, Dwell can be set by seconds or milliseconds. Enjoy 
P.S.: smoothieboard owners, save your time, I made a module that directly interprets canned cycles. You can found the source on Github https://github.com/lautr3k/Smoothieware This is a beta version. It works well, but I need you to more serious tests.
Peace.