Bump version to 2.0a1
Move OPML import/export to a module.
Move OMPL import/export UI to the Options drop-down panel.
Remove the interface to change the location of the home folder.
Remove old cruft from the options window code.

Remove separate JS classes for what used to be different panes,
remove unused CSS rules and images, etc.
Make options window non-resizable.

Reset the window ID to invalidate the previously persisted size.
Rename groupboxes in the options window.