fixed misspelling of converged

It kept bugging me haha
Merge pull request #446 from cxhernandez/patch-2

fixed misspelling of "CONVERGED"
Compile on old compilers
c89 comments
Merge pull request #449 from rmcgibbo/no-sse4-compiler

Compile on old compilers (Fix for #445)
Remove extraneous print statements in NMR
Fixed typo in prmtop
Working mol2 parser.
Added test of CONNECT entries.
Use six to import cStringIO
Finally fixed six import issue cstringio
Fixed deprecated cStringIO.reset() call
Fixed issues robert fould
more tests
Added note
Changed resSeq to ints in mol2
Added comment about bond number subtraction
Merge pull request #451 from kyleabeauchamp/master

Remove extraneous print statements in NMR
Convenience methods
Merge pull request #453 from rmcgibbo/top-convenience

Topology convenience methods