Merge pull request #184 from BrianAdams/v2.5.0-rc1

fixes #177; removed bad reference and simplified calculation
fixed #176; The arduino firmware now manages reversing thruster orientation
Merge pull request #206 from BrianAdams/issue176b

fixed #176; The arduino firmware now manages reversing thruster orientat...
Fix #203, update express version
Adding LED indication when the root resize is done (fixes #210)
Pinned the express version number in package.json
Fixed #214; Set the default to vertical thruster reversed.