Added systemtest Spectrum.test_grace_int, to test plotting the intensity per residue.
This is to prepare for a grace plotting of the signaÃl to noise level per residue.
Also added additional tests for signal to noise ratio calculation in the systemtest Spectrum.test_signal_noise_ratio.
Authored by: tlinnet 2014-12-06
Parent: [r26975]
Child: [r26977]
