Added files from previous PR
Added separate method to Vector
Merge branch 'master' of https://github.com/sympy/sympy into newfunctions
Fixed travis errors
Matrix.det_bareis is sensitive to ImmutableMatrix
sympify args of MatrixExpr functions

Otherwise Matrix objects can creep in
explicitly merge MatrixBases in MatAdds
matmul merge_explicit rule
matadd/matmul: fix doc and unittests

Signed-off-by: Thomas Hisch <thomas.hisch@ims.co.at>
Merge pull request #17 from thisch/mrocklin-matexpr-sympify

matadd/matmull fix unit and doctests
Added DFT matrix
MatMul merge explicit does not commut matrices
Change the name of function
Add support for Equivalent with multiple arguments
Fixed python3 compatibility issues
Merge pull request #7250 from mrocklin/matexpr-sympify

Matexpr sympify
Give doctest section titles a line of whitespace beneath.
Minor change
PEP8 Style
import xrange from sympy core