browsers: more browsers, better names

added a few more browsers like google chrome canary. ordered them better. moved specific browsers to the bottom of the options list. 

![screen shot 2013-12-13 at 6 42 04 pm](https://f.cloud.github.com/assets/643505/1747685/53afdbc8-6469-11e3-886a-45ff8c3ff797.png)

i wanted to add nightly firefox builds too, but i don't know if they exist like canary.