Add some basic accessors, so future subclassing/refactoring is easier if we start adding other search types.  Return a string instead of URL for the base URL, since that's what we need anyway.  Fix NSXMLDocument leak.
Add some basic accessors, so future subclassing/refactoring is easier if we
start adding other search types.  Return a string instead of URL for the base
URL, since that's what we need anyway.  Fix NSXMLDocument leak.


JackieXie168/skim,JackieXie168/skim,JackieXie168/skim,JackieXie168/skim,JackieXie168/skim