Log Message:
Upgrade to version 2.2 RC4.

Official changelog:

Keep floating windows on top of the stack
Simplify grabkeys() function
Verify user input for tag values (mwfact, nmaster and ncol) (bug #91)
Fix some problem with include() in configuration file (bug #99)
Add make targets replacing the running awesome
Bugfix in client_toggletag and checking if no tag selected

Fix segfault after viewing same tag twice and doing a tagprevselected (bug #76)
Client_moveresize fix
Check widget position (bug #68)
Change awesomerc manpage to section 5 (bug #79)
Support for include() in configuration file
New system to drop EnterWindow events
Textbox can be flex-aligned
Add widget names in warnings
Fix multi-monitor mode with Zaphod and xrandr (bug #73)

Fix CPU usage (bug #68);
Fix regression with Zaphod mode (bug #73).

Fix crashing bug triggered through awesome-client
Do not die anymore on bad config file, use a default internal one
Add uicbscreenfocus to switch to a specified screen.
Add a focus history.
Accept --version option.
Add spiral and dwindle layouts.
Widget-ise the statusbar.
Add new widgets: textbox, graph, progress bar, taglist, focustitle, tasklist, \ 
iconbox, layoutinfo, netwmicon.
We can now have several statusbar.
New uicb: focusclientbyname.
Partial EWMH support.
Switch to autotools based build system.