Added simulation of tumble recovery.  Has pretty major FIXME which needs
addressing.
Implement tumbling based on the mathematics in techdoc.pdf.  Change the
conditions to transistion to tumbling to include aoa>30.
Fixed AOA tumble condition.  AOA is stored in radians not degrees.
Merge branch 'tumble-recovery' into kruland-integration

Conflicts:
	core/resources/datafiles/examples/Three-stage rocket.ork
	core/src/net/sf/openrocket/simulation/BasicEventSimulationEngine.java

Ignored changes to Three-stage rocket.ork since that will need to be
reproduced after the cool 3d view enhancements to the example.

The BasicEventSimulationEngine conflicts were trivial and manually
resolved.