Add fastcache as an optional depency.  Use fastcache for travis tests
Added dyadic code, WIP
Dummy commit
Polished code, tests pass
Updated to fastcache 0.4.0 api and change test splits with fastcache
Add check to ensure that proper version of fastcache is being used
Merge branch 'master' of https://github.com/sympy/sympy into dyadicvector
Code quality changes, moved rdot code
More code quality improvements
Merge branch 'master' of https://github.com/sympy/sympy into dyadicvector
Derivative now works with vector core
Rectified bugs in coordsysrect
Merge branch 'master' of https://github.com/sympy/sympy into dyadicvector
Refactor tests - use fastcache by default
Add NOFASTCACHE to pypy and sphinx tests and ensure that fastcache is not used in conjuction with pypy
only test polys and plotting for 2.7 and 3.4 for GMPY and MATPLOTLIB
Merge branch 'master' of https://github.com/sympy/sympy into dyadicvector
Fixed minor errors in code
Added tests to cover more code
Merge branch 'master' of https://github.com/sympy/sympy into dyadicvector