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.
7963: Ray respects 2nd and 3rd quad angles
Raise TypeError instead of returning False, if we can't sympify 'other'

Unfortunately, we can't use _sympifyit decorator, because in py2 class
instances are compared by object identity ("address") if no other
comparison helpers are defined.

fixes #7833
Use S.Infinity in _infimum_key, if we can't return infimum
use Piecewise for Ray creation from angle
Added field numbers in .format call for Python 2.6 compatibility.
test non-linear equations in _solve_system
Merge pull request #7964 from smichr/7963

7963: Ray respects 2nd and 3rd quad angles
Merge pull request #7956 from skirpichev/7833-fix

relational ops: Don't use False as a replacement for 'other', if we can't sympify 'other'
Add Mridul Seth to AUTHORS/aboutus. Welcome to SymPy!