Added Tests for wigner.racah()
Removed unnecessary import
Removed useless prec argument from clebsch_gordan and wigner_3j
Renamed test file
Small change
Fixed Travis fail issue
Added test for half integers for which racah was raising error earlier
Added Tests for wigner.racah()
Removed unnecessary import
Removed useless prec argument from clebsch_gordan and wigner_3j
Renamed test file
Small change
Fixed Travis fail issue
Added test for half integers for which racah was raising error earlier
Merge branch 'wignerfix' of https://github.com/debugger22/sympy into wignerfix
Some changes in test_racah
Merge pull request #2992 from debugger22/wignerfix

Removed useless argument, added tests for wigner.racah(), Fixed error for half integers