Validate

to test, try adding invalid input according to the following spreadsheet (only need to worry about the green rows): https://docs.google.com/a/opentechinstitute.org/spreadsheet/ccc?key=0AkhY7epZlXFadGRWMUJtUG43R3lfc2U2eWx6cUIweHc&usp=drive_web#gid=0

be sure to test blank input, input that is too long, and invalid characters.

includes 6 other pull requests referenced below.

**NOTE:** This also changes the default mesh SSID to `commotionwireless.net` and also addresses https://github.com/opentechinstitute/luci-commotion/issues/144 and https://github.com/opentechinstitute/luci-commotion/issues/140