Use EXPECT_DOUBLE_EQ instead of EXPECT_NEAR for colour tests
Use EXPECT_DOUBLE_EQ instead of EXPECT_NEAR for colour tests

Issue #68.

OpenCMISS/zinc,OpenCMISS/zinc,OpenCMISS/zinc,hsorby/zinc,hsorby/zinc,hsorby/zinc,hsorby/zinc,OpenCMISS/zinc