xmonad-contrib.cabal: simplify xmonad dependency to >=0.10 && < 0.11
xmonad-contrib.cabal: simplify xmonad dependency to >=0.10 && < 0.11

Ignore-this: 1ff5a0caa2a1e3487e9a0831e385b3d2

Unless there is a particular reason for listing the lower and upper bounds
separately then this seems simpler and cleaner.

darcs-hash:20120312101800-2376b-352f75ffc425adca3217cba8c6725cf23fb04f9f

kmels/xmonad-launcher,kmels/xmonad-launcher