Merge pull request #51 from gradylemoine/master

Now giving error for trying Strang dimensional splitting in 3D
fixed typo: iout_aux setting should depend on self.num_aux not self.num_eqn.
Merge pull request #52 from rjleveque/outaux

fixed typo: iout_aux
Fixing limiter labels
Merge pull request #54 from gradylemoine/limiter-label

Fixing limiter labels
Syncing with central version
Adding support for bare scalars for 1D BC codes.  Also adding more error checking.
Merge pull request #55 from gradylemoine/1d-convenience

1D convenience tweak for BC codes