minor change to line continuation suggestion
Merge pull request #10 from aitatanit/master

minor change to line continuation suggestion
change angle to gamma in force balance fig

there is still some confusion with angles in the text -- I updated the
figure showing forces to name the flight-path angle gamma (while
discussion above used theta for pitch angle, positive up!)
explain we follow Milne-Thompson/ centrifugal force

Derivation uses theta as positive upwards, and forces are in a rotating
frame, so we should properly speak of centrifugal force
checking a sign, executed style, no changes
Merge pull request #1 from numerical-mooc/master

Update from original