Fixed head updates so that removing a monitor on the left no longer
makes stumpwm have a heart attack.
Merge branch 'master' of https://github.com/sabetts/stumpwm
Merge branch 'master' of github.com:sabetts/stumpwm
Sort screen heads by something saner than ID.
Merge branch 'master' of github.com:robgssp/stumpwm
bugfix for shift modifier setting in xwin-grab-keys.
Merge pull request #35 from matko/grab-keys-shift-2

bugfix for shift modifier setting in xwin-grab-keys.
Merge pull request #14 from robgssp/master

Monitor Reconfiguration Fix
Re added docstring to head.lisp