Watchers.cs: add URL regex for Win-style paths we insert on drag'n'drop
Watchers.cs: add URL regex for Win-style paths we insert on drag'n'drop

We will now properly highlight and open URLs produced by dragging
and dropping a file or directory on Windows.

Fixes #22.

Signed-off-by: Alex Tereschenko <10ab4a620366487513eb6142e6429449f497066c@gmail.com>

tomboy-notes/tomboy,tomboy-notes/tomboy,tomboy-notes/tomboy,tomboy-notes/tomboy,tomboy-notes/tomboy