Compatibility updates.

  We can now build on Mac OS X and DragonFly, with either Lua
 5.1 or 5.2
  Build with Lua 5.2 too.

  lua_open was removed and must be added as a macro.
  Export VERSION and CONFIG to Lua.

  These map to the obvious things.
  Moved variables to their own stanza.
  Fixed error with nesting of debug-versions.
  Added readdir + FAQ explaining why you might want it.
  Add an example.
  Install README.md + FAQ.md
  Added a question on naming.
  Output information, under --debug, for all changing-operations.

  This is just to be neat.
  New release
  new release
  Changed implementation for counting workspaces.

  Turns out there is a `wnck_screen_get_workspace_count` function
 which I didn't know about.
  workspaces(N) will now set the number of workspaces.

  This is neat.
  workspaces(N) will now change the number of workspaces
  Added `activate_workspace(N)`.

  Which is nice to have.
  Remove dh_shlibdeps invocation.