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
remove positive kernel check from powdenest

It is not always true that (p**x)**y = p**(x*y) if p is positive.
It depends on the value of x. e.g.
>>> e = 3 + I
>>> r = Rational(1, 3)
>>> b = .02
>>> ((b**e).n()**r).n(2)
0.014 + 0.014*I
>>> (b**(e*r)).n(2)
0.0053 - 0.019*I
Fixed value for `coth(0)`

coth(0) = zoo (Complex Infinity)
For reference: http://www.wolframalpha.com/input/?i=coth%280%29
Create auto update mechanism for development docs [skip ci]
Merge pull request #7634 from sushant-hiray/coth-fix

Fixed value for `coth(0)`
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
Implement __ne__() by calling __eq__()

The __ne__() operator should return "not __eq__()". Alternatively, one can copy
& paste the algorithm from __eq__() and negate the answer right before each
return. But anything else means there is a potential bug.
Merge pull request #7636 from smichr/pow

remove positive kernel handling
Update piecewise.py

Corrected a typo.
Merge pull request #7647 from coder006/typo

Correct a typo in piecewise.py
Merge pull request #7645 from certik/ne

Implement __ne__() by calling __eq__()
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.