First stab at preferences via combining app data facility and optset classes.
Rename "cmtbase" to "cmtobject".
Re-fixed "outset". It needs to set defaults on no arguments, not nothing.
Added a function to clear preferences.
The szego class seems to now work under new preference scheme.
Stripped ability to use plain structures to store preferences.
Re-indented szmap.
Re-indented conformalmap.
The szego map now uses new preference scheme.
Added set and get methods to optset.
Changed szego and szmap to use get/set methods in optset.
Reorganized property list in szset.
Merge pull request #23 from ehkropf/issues/#13-preferences

Provides enhancement changes from #13.