Merge pull request #17 from rachelslaybaugh/tmpdev

Tmpdev
Refactored varable iall to moments converged
Removed unnesesary framework for meth variable that was originally intended for the AHOT-N-NS-3D Method (ITM), but never implemented
Refactored err variable to convergence_criterion
Refactored fortran variable tolr to more appropriate name converge_tolerence
Updated api, docs, ipython example, users guide, etc
Updated pyapi with formatting and more descriptions,  etc
Sebastian's changes; doesn't build yet
removed some line breaks in fortran.rst to remove doc build errors; may need review but builds without errors.
got rid of build errors in spatialsolvers.rst; I still need to check the output entries stuff to clean it up.
cleaned up a little bit of format; need to do a readthrough (may add math font) for spatial_solvers.rst