Misc: GLX: Avoid using multi-sampling visuals

Avoid using multi-sampled visuals, like the cogl patch:
http://people.freedesktop.org/~glisse/0001-glx-do-not-use-multisample-visual-config-for-front-o.patch
Improvement: --unredir-if-possible-exclude & --unredir-if-possible-delay

- Add --unredir-if-possible-exclude, to exclude certain windows when
  evaluating --unredir-if-possible. (#140)

- Add --unredir-if-possible-delay, to add some delay before
  unredirecting screen. (#138, #140)

- Code clean-up.
Misc: Update CMake files & docs

Update CMake files and docs. CPackConfig.cmake has some issues. At
least, it builds correctly with CMake now.
Bug fix #140: Possible fix for CPU usage with --unredir-possible-delay

- Possible fix for high CPU usage with a low --unredir-possible-delay.
  Thanks to Feltzer for reporting. (#140)

- Rewrite some parts to (hopefully) increase performance, especially
  with --unredir-if-possible.

- Known issue: With GTX 670 and x11-drivers/nvidia-drivers-325.15, and
  compton --unredir-if-possible --config /dev/null, if you send a
  SIGUSR1 to compton when a full-screen solid window is there, in which
  case compton either redirects then immediately unredirects the screen,
  or just don't redirect it altogether, X freezes after compton
  unredirects the screen. Requests sent by other X clients are not
  responded until compton is killed, which indicates the possibility of
  a bug in X.  Attaching to X process shows X is on ./os/waitFor.c.
  Backend does not matter. --paint-on-overlay fixes the issue somehow.
  compton-git-v0.1_beta1-5-g4600f43-2013-08-28 doesn't exhibit the
  issue, but it's probably timing-related.
Bug fix #143: Move setlocale(LC_NUMERIC, "C")

Move setlocale(LC_NUMERIC, "C") to a better place, in hope to fix #143.
Thanks to hiciu for reporting!
Bug fix #143: GLSL shader error on European locales

Set LC_NUMERIC=C when generating GLSL shader strings to avoid decimal
point issues on European locales. Thanks to hiciu for reporting.
Bug fix #144: Workaround for insane window type changes

Dynamically detect window type as a workaround to insane applications.
Thanks to Feltzer for reporting. (#144)
Misc: Add make-release.sh

Add make-release.sh, which creates a release tarball, with
documentations built (to lift asciidoc dependency), and COMPTON_VERSION
defined.
Bug fix #99: Rewrite focus detection logic

- Rewrite focus detection logic. Remove w->focused_real and use
  ps->active_win to identify focused window uniformly. Use a more
  expensive way to filter FocusIn/Out events to improve reliability.
  Only limited tests are done, and bugs are likely to be introduced.
  (#99)

- Known issue: Under fvwm, compton sometimes does not consistently
  report the window input gets sent to. But there's something wrong in
  that case: XGetInputFocus() shows the root window is focused but
  another window is receiving input.