L.Cross: clarify documentation
L.Cross: clarify documentation

Ignore-this: 4a5dcf71e63d045f27e2340e1def5cc8
Amend-record earlier patch to work with byorgey's fix,
this one is just the documentation typo fixes and
clarifications.

darcs-hash:20090222042220-d17f0-32329983226b5a0c52753796ddcc67c9a8046390

jthornber/XMonadContrib,jthornber/XMonadContrib