Normalized Jacobi polynomials
Fix docstring of normalized Jacobi polynomial
Euler totient function as symbolic SymPy class
Hints now return eq also
Merge pull request #2009 from raoulb/jacobi_poly_norm

Normalized Jacobi polynomials
Merge pull request #2043 from Manoj-Kumar-S/bug

Fixes Issue 3780
Merge pull request #2036 from hacman/totient

Symbolic Totient
Skeleton for elliptic integrals
major rewrite of pull #1408:

    * change names
    * docstrings
    * some documentation
    * mpmath translations
    * eval(), fdiff(), some rewrite methods
Added tests for elliptic integrals
Some support for latex printing of elliptic integrals
Add tests for elliptic integrals in test_args.py
Add numeric tests for rewrite's
Add comments about branch cuts