Adding grunt-mocha to package.json

Updated emmc copy to create a partition with more inodes

Added gitter badge

Added gitter badge

Merge branch 'v2.5.1-rc1' of https://github.com/OpenROV/openrov-software

 into v2.5.1-rc1

Fixed #239; Constrain motor signals to allowed range

Tested on hardware.

Quick and Dirty fix for Chrome API gamepad change

Added UI change to match new power default

Tagging version used to create image v2.5-7

Merge pull request OpenROV#168 from codewithpassion/controlboard25_im…

…ageupdate

Fix service startup script that kills other node processes on stopping