Fixed prefs to not die when prefs file is missing; made "prefs" be default title in prefs files.
Various small fixes. Serpent compiler/interpreter has a fix for objects where instance variable and method have the same name. debug.srp has * command to print prettier stack frame and instance variables.
Preparing release 540
Fixed some bugs in #noop directive.
Recent improvements resulting from work on Arco.
Work on MIDI documentation, moved cmdline to lib, implemented file.name(), added new parameter so that wxserpent controls call handlers with different kinds of signatures: full as before (default), just x, just obj and x, and now you can .add_callback() to call a global function without providing the nil target parameter in .add_target_method.
Enhance for options with multiple values.
Adding new file to repo.