Cleaned up Trimmer and SigNoise, fully functional

These functions are completely ready for use now; note that one relies
on the other (SigNoise) invokes the usage of Trimmer in it's
functioning; Trimmer uses the "findpeaks" function, though it's
important that it's the "findpeaks" included with the MLS package we
downloaded, NOT the "findpeaks" that comes with Matlab!