Upgrade to release 1.6 with changes in core, combinatorics,
calculus, assumptions, functions, geometry, holonomic, integrals,
logic, matrices, ntheory, parsing, etc. For more details:
https://github.com/sympy/sympy/wiki/release-notes-for-1.6
The year in file LICENSE was updated and the checksum changed.
The license remains the same.
Signed-off-by: Leon Anavi <leon.anavi@konsulko.com>
Acked-by: Trevor Gamblin <trevor.gamblin@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
