Modified latex printing of Lambda to use \mapsto
Modified tests so working with \mapsto version of Lambda
Removed  that I forgot about in test_latex.py
Modified tests to include parentheses around whole Lambda expression
Corrected tests for Lambda
Handle unicode literals properly in matrices

Fixes #7604
Added a few rules for imageset simplification
Create auto update mechanism for development docs [skip ci]
watch for improper separation of base and exp in powsimp

e.g. sqrt(x**a) should not be split as x**a, 1/2 otherwise
it will rejoin as x**(a/2) later -- this is noted with an
inline comment.

For example, consider sqrt(exp(x)) which previously simplied
to exp(x/2). It is easy to demonstrate that these can be different:

>>> eq = sqrt(exp(x)) - exp(x/2)
>>> eq.subs(x, 3 + I).n()
-7.86610435188672 - 4.29727239280679*I
Added Ambar Mehrotra to the AUTHORS/aboutus. Welcome to SymPy
Merge pull request #7625 from hargup/imageset_simplification

Added a few rules for imageset simplification
Incomplete doc in deutils

A line is complete in docs in _desolve in deutils. It can be more than one thing possible there. I need suggestions to complete this sentence.
Rewrite lambda as a function.  This avoids a runtime error (i.e. return
value of cached and not cached function differ)  with

SYMPY_USE_CACHE=debug py.test -x sympy/integrals/tests/test_trigonometry.py
Merge pull request #7613 from clsn/str_unicode

Handle unicode literals properly in matrices
Add Mark Shoulson to the AUTHORS/aboutus. Welcome to SymPy
Completed the doc sentence of _desolve in deutils.py

The sentence, This is useful when the function, was incomplete earlier. It is now replaced with `This is useful when the expression has more than one function in it.`
Merge pull request #7657 from KDMOE/typo_deutils_desolve

Incomplete doc in deutils [skip ci]
Merge branch 'latex_Lambda' of https://github.com/dpsanders/sympy into dpsanders-latex_Lambda
Correct failing test
Add some names to .mailmap