Merge pull request #1 from juergenhoetzel/master

Handle Dired(+) buffers correctly and keep wg-list sorted (MRU)
Fix Repository URLs
correct a typo

jump to the help window when the help buffer is launched
Revert dacdd8e (Keep wg-list) in MRU order

This commit broke wg-switch-to-index, refs #18.
`wg-read-workgroup': Start list of choices with wg-previous-workgroup

Refs #18
`wg-switch-to-window-buffer': use unique buffer names

if a buffer name exist in multiple workgroups (visiting different
files) rename-buffer will raise an error when UNIQUE is omitted.

Refs #26.