Added:
- a flag in the fast scan controller/configuration/configurationView to enable up/down scanning.
- Logic inside of the fast scan controller to figure out what values to use for start, end, and relative moves if a down scan is detected

Modified:
- SGMFastScanActionController now iterates the energy list first to get a full listing of energy values.
- There is now an if/else statement to figure out which one of two possible loop iterations to do to fill up the data (one for up scanning and the other for down scanning).
Implemented description() in SGMFastScanConfiguration2013.
Got rid of some commented out code.
Merge pull request #988 from acquaman/Issue987

Iain had to take off, so just taking care of this.