Added code minus tests
Added basic vector tests
Merge branch 'master' of https://github.com/sympy/sympy into basicvector
Added Del operator tests
Merge branch 'master' of https://github.com/sympy/sympy into basicvector
Rectified bugs, made improvements in __new__ code
to update
Merge branch 'master' of https://github.com/sympy/sympy into basicvector
Added doctests
Merge branch 'master' of https://github.com/sympy/sympy into basicvector
Rectified doctests
Rectified bugs for simplify and trigsimp
Added arg tests, modified simplify and trigsimp code
Merge branch 'master' of https://github.com/sympy/sympy into basicvector
Fixed indentation error
Rectified bugs in simplify.py
Removed stray print statement
Merge branch 'master' of https://github.com/sympy/sympy into basicvector
Added hashing method for BaseVector
Added hashing for vectorAdd and VectorMul
Merge branch 'master' of https://github.com/sympy/sympy into basicvector