Better error handling when getting sizehints fails
Reset sizehints when notified they're deleted
Use previous sizehints when applying winprops
* Somewhere around Lua 5.1 math.mod() was renamed math.fmod(). Added a check for the original math.mod() before calling.
* Added an comment and an alternate MPD session string to statusd_mpd for situations where the server closes the connection too quickly for the script to properly ascertain server status.
Use 'goto_focus' instead of 'goto' in contrib

'goto' is a reserved name in lua 5.2+, so 'goto' will not work in those cases.
Merge branch 'contrib_goto_focus'
Fix memory pooling for deferred tasks

Because of a mistake in the pointer arithmetic the wrong deferred would get
freed, leading to wrong callbacks and even infinite loops in the list of
callbacks. Probably/hopefully fixes bug #77.
Merge branch 'remotes/jsbackus/mpd_lua52'