initial implementation of sympy.physics.quantum.pauli, containing the pauli sigma operators and states that they act on
made pauli operators commute with boson operators
fix bug in use of warnings module. improved support for normal ordering expression of products of mix of differetnt types of operators
improved support for simplification of products that includes an identity operator
Fixed bug in handling of non-operator base Pow instances in sympy.physics.quantum.operatorordering
support for indices for Pauli operators the in quantum.pauli module
keep floor(i) unchanged if i is imaginary symbol
`ufuncify` makes actual ufuncs

This is a rough pass at getting ufuncify to make actual ufuncs. It
works, but needs some cleanup, optimizations, tests, and documentation.
Changed __add__ to return the correct phase for the addition of two TWave objects
change warning flag to warn in line with code
Adds line wrapping to Fortran codegen call signatures.

Fortran has a maximum line length of 132 characters. The fcode printer handles
this for the expressions itself, but the call signature failed to wrap if the
number or length of arguments is too large. This fix should deal with most
normal cases.

Fixes issue #7934.
Added field numbers in .format call for Python 2.6 compatibility.
test non-linear equations in _solve_system
cache autowrap
Merge pull request #7968 from moorepants/fortran-arg-line-wrap

Adds line wrapping to Fortran codegen call signatures.
Merge pull request #7921 from smichr/real3

keep floor(i) unchanged if i is imaginary symbol
fixed docstring tests
Merge pull request #7979 from smichr/geom

add pi/2 awareness to piecewise of Ray when giving arbitrary angle
Fix the MathJax CDN

The old CDN gives 404. We also need to go in the docs repo and retroactively
fix all built docs there.

Fixes #7983.
change docstring to reflect preference for tuples over lists