Log Message:
Update to xcompmgr-1.1.5. Changes:
Add README with pointers to mailing lists, bugzilla, & git
Migrate to xorg macros 1.3 & XORG_DEFAULT_OPTIONS
Fix formatting of options/arguments in man page
Add COPYING file with copyright/license notice from xcompmgr.c
Make usage() report the current version.
Ansification and compile warning fixes.
Fix error reporting
Don't hard code the screen number
Check for _NET_WM_CM_Sn before trying to install ourself as composite manager
Try to report current composite manager name