Merge pull request #561 from tristannovak/master

Survey (Grid) V1 Updates
speech: add armed check to low alt, and low airspeed warnings
DFLog: add extra df ERR messages
gridv2: mod color
spline: update first spline point to match actual
Merge branch 'master' of http://github.com/diydrones/MissionPlanner into SurveyGridusespeed