Rules refactor, part 1
This fix the following awful.rules bugs:
* **x**: Broken when "border_width" is set or left titlebars are used
* **y**: Borken when"border_width" is set or top titlebars are used
* **width**: See above + right litlebar
* **height**: Same as above
* **switchtotag**: Have a race with the "manage" -> "tag.withcurrent" code in `awful.tag`
* **tag**: Had dead code
* **screen**: Had a race condition with switchtotag
* **urgent**: Had a race with screen and another with switchtotag+focus
* **focusable**: Was broken yet again when request::activate was introduced (and also because of FS1098, that I also fixed)
* **no_overlap**: The "no_overlap" call in rc.lua "manage" section conflict with the geometry rules as the hints are not set (idk why).
* **size_hints_honor**: If set to false, it would be applied too late, causing height and width offsets due to placement or various geometry related properties