Added more Tests
Add fastcache as an optional depency.  Use fastcache for travis tests
Split geometry.rst into module specific files and also add rsts for new geometry modules
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
roots allows trig keyword: return cubic roots in terms of cos
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
Added more tests and changed the name of Plane.equal method to Plane.is_coplanar
Code cleanup
Merge https://github.com/sympy/sympy into plane
Changed a test which resulted in the error