Merge pull request #2 from thearn/dev

Dev
Merge pull request #3 from thearn/dev

removed pre-conditioning for now
Merge pull request #4 from thearn/dev

tweaks to params
Merge pull request #5 from thearn/dev

added restart capability for snopt
changes to rk45 to showcase two differnet methods
Merge pull request #6 from Kenneth-T-Moore/master

changes to rk45 to showcase two differnet methods
latest fixes
Merge pull request #7 from Kenneth-T-Moore/master

latest fixes
added ground station optimization example