Added __repr__ for vso.attrs.Wave
Unit test for Wave repr
Consulted derdon for __repr__ standard consistency
Minor correction in repr
Shifted Wave's repr test to test_vso.py, used assert statements
Forgot to add the repr call in assert
Problem with Wave due to no import; changed it to vso.attrs.Wave
Travis reports ValueError; removed the assert call with RandomUnit
Commented out moarwav, which had RandomUnit as an instantiation argument
In assert call for wav, made the numeral arguments floating point ones.
Implemented derdon's request for change in Wave.__repr__()
Added test case with nanometers; cleaned out earlier cases
Changed nanometer unit back to angstrom; confirm valid units
Removed fixture statement
Merge pull request #786 from VaticanCameos/master

__repr__ for vso.attrs.Wave