Add Rajath S to AUTHORS/aboutus. Welcome to SymPy!
Merge pull request #2885 from smichr/auth

Add Rajath S to AUTHORS/aboutus. Welcome to SymPy!
Refactored off of master merge.
Merge pull request #2829 from bjodah/cse_on_indexed

Cse on indexed
Fix mpmath docs
Fix zero vector reexpression
Merge pull request #2887 from srjoglekar246/fixzero

Fix zero vector reexpression
travis: split slow jobs
Allow external sources for pip while installing matplotlib
Merge pull request #2881 from skirpichev/travis-split-slow

travis: split slow jobs
Changed to raw strings in LaTeX tests.
Minor formatting updates.
Fixed Interval._eval_imageset

Interval._eval_imageset was not working well the give function was not
monotonic. Now it is evaluated by finding out the maxima, and minima of
the function by solving the derivative of the function in the given
interval.
Added TODO for pretty printing tests.
Complete references for Airy argument transforms
continued_fraction_rational_number function modified. Doctest errors resolved.
Merge branch 'master' into issue-2769
Merge pull request #2723 from hargup/imageset

Fixed imageset for Interval
Docstring improved, references added
Docstring improved unused variables removed