Shorten Greek translation of 'Scheduled Play' (CC-4947)
CC-4943: Raspberry Pi optimization: don't create new background AJAX request until the previous one has returned

-fixed
Merge branch '2.3.x' of dev.sourcefabric.org:airtime into 2.3.x
Stopped refetching calendar events when calendar is resized
Merge branch '2.3.x' of dev.sourcefabric.org:airtime into 2.3.x
add minified datatables.js and upgrade from 1.9.1 to 1.9.4
Merge branch '2.3.x' of dev.sourcefabric.org:airtime into 2.3.x
CC-4950: builder-feed is called twice on NowPlaying screen load
Update ColReorder Datatables plugin
CC-4955: Datatables saves its parameters twice on every page load

-fixed
remove unecessary file + better error handling
add silan to tarball full install
CC-4956: Merge nginx + apache install full scripts

-fixed
CC-4957 : Replay Gain undefined error, json response not being sent back properly.
Merge branch '2.3.x' of dev.sourcefabric.org:airtime into 2.3.x
Revert "CC-4955: Datatables saves its parameters twice on every page load"

This reverts commit 39ec07e71c11a04290df988731549b589bddea7b.
Merge branch '2.3.x' into devel
Merge branch 'devel' of dev.sourcefabric.org:airtime into devel