Fixed warning in starfield code
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Gravity is ON near origin, off in space, and a gravity field can be created with getGravity()
Small speed/cleanup to thrust setting
Changed velocity to be dvec3
Merge pull request #143 from PhilipRosedale/master

Added local gravity fields
Merge remote-tracking branch 'upstream/master' into agentlist-array
resolve conflicts on merge with upstream master