`emacsclient` started with `-c` or `-t` argument create a new frame that shall
not be used to manage X windows.
Also fix some related input focus issues (with some remaining unfixed).
Close#17.
* Relax the conditions to refresh layout; this may introduce some overheads
though
* Fix the problem when `*scratch*` buffer is killed; close#12
* Enhance `exwm-reset` by forcing layout refresh in it. This should allow users
to overcome some layout bugs
* Fix input focus lost after moving window to another workspace
* Enhance `exwm-reset` to provide user a way to reset input focus when it's
lost unexpectedly
* Fix `exwm-reset`
* Make input mode buffer local
* Allow window to stay in `char-mode` while setting input focus to other window
or switching to other workspace
* Correct ConfigureNotify events sent to fullscreen windows.
* Exit fullscreen mode before switching workspace.
* Temporarily treat `xcb:Atom:_NET_WM_STATE_ABOVE` as
`xcb:Atom:_NET_WM_STATE_FULLSCREEN` since
a) "plugin-container" (Flash Player) seems only set this, and
b) it's not normally used by applications.
This makes fullscreen videos working in e.g. iceweasel.
