Adding Dynkin diagram functionality
Updating some things
Fixing some errors
Karatsuba multiplication for polys
Add tests
Include Order term, since we properly support one for x -> oo
Fix issue 1091: Implement _eval_nseries for loggamma
return 1 for z=0 early in _hyperexpand()
Implement series expansion for elliptic_e(z) and elliptic_k(z)
Fixed apparent bug at hyperexpand_special
elliptic_integrals.py: More short doctests for series + regular tests for series
Fix issue 3174: do substitution first in evalf_sum()

    N.b.: XFAILed test was changed due to adoption of
    the Karr convention for summation.
Fix and UnXFAIL tests in test_expbug4_failing(); see PR #757
Fix and UnXFAIL test in test_expbug5_failing(); see PR #757
Drop test_series1_failing() introduced in PR #757, see test_simple1()
Revert "Drop test_series1_failing() introduced in PR #757, see test_simple1()"

This reverts commit 754f3aa44b1e695e8195273232f2ad3e4cfae5da.
Kahane's algorithm to remove contracted gamma matrices from expressions in four dimensions.
Algorithm is now explained in docstring, docstring now linked to sphinx. Files moved to the physics module. Minor fixes in source code.
Add faster cse routine (WIP)
Add CSE for MatrixExpr adds (WIP)