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
Added docstring to lambdified functions

If arguments have names, that is used. Otherwise the stack is inspected
to determine if the name can be inferred *with certainty*. If there is
more than one variable pointing to the object, then the name cannot be
determined with certainty, and 'arg_#', where '#' is the number of the
arg is used.
Change Kane and Lagrange attributes

- KanesMethod has q and u as full attributes
- LagrangesMethod has q as a full attribute
- KanesMethod now stores forcelist and bodylist as attributes
Add @property to some attributes

- KanesMethod.q, .u, .forcelist, and .bodylist are all read-only now
- LagrangesMethod.q, .u, and .forcelist are all read-only now
Fixed typos in four files
Catch some "flips" for inequalities with NumberSymbol's

e.g. pi > x was processed before to (-pi) < (-x)
Merge pull request #7918 from skirpichev/oo-ineq-2

Catch some "flips" for inequalities with NumberSymbol's
Merge pull request #7990 from raj454raj/typo

Fixed some typos
Revert "simplify Mul._eval_is_even"

This reverts commit 1b436d045107f610b51065e03eff0dbdf92e76c5.

This "simplification" produces loop, because Add._eval_is_odd
call in turn is_even property on Add's arguments.

fixes #8050
Revert "remove log.is_zero routine"

This reverts commit de47eb297f822edea3b70b8d8cf094072833b806.
Merge pull request #8052 from skirpichev/8050-fix

Revert "simplify Mul._eval_is_even"
Added args test. Fixed code style error. Fixed missing import bug in unit test.
when --rerun is specified print the rerun number before the test
Cleanup log._eval_is_zero, add tests
remove version constraint from pip install fastcache