Started work on parsing out preset details

Loading details like amp model, parameter settings, etc. Details we'll want to see on the printout.
Adding enums for amp & fx models
Added helper method for getting the names of amp models

Also added parsing of amp models from preset file
Parsing names of FX units
Basic updating of UI with preset details
Added preset details to UI

Not sure if there are enough words to describe how much I hate Interface Builder and it's UI constraint garbage…
Cleaning up the UI layout a bit. (Removed those *@&#^ing constraints)
Fixed alignment on description field
Starting work on parsing out G_Dec amp models
Finished parsing of G-Dec amp models
Merge branch 'refs/heads/printing' into develop

* refs/heads/printing:
  Finished parsing of G-Dec amp models
  Starting work on parsing out G_Dec amp models
  Fixed alignment on description field
  Cleaning up the UI layout a bit. (Removed those *@&#^ing constraints)
  Added preset details to UI
  Basic updating of UI with preset details
  Parsing names of FX units
  Added helper method for getting the names of amp models
  Adding enums for amp & fx models
  Started work on parsing out preset details