Improve help of CAT Class
Add function solutionMethods which returns a list of the installed solvers
Improve help for all CAT properties.
Use this help text in CATTube ToolTipStrings
Remove CAT constructor function - not needed. Simpler to force users to define everything separately
Change comments to make layout easier to read (especially using 'Show cell titles' in matlab editor)
Update help comments in CATTube for better layout