CC-5138: Linked Show: Time limitation exceeds when adding 24 hours smart block into daily repeating & linked shows

Removed propel from calculateCrossfades function and used prepared statements instead
CC-5049:
Error messages on Liquidsoap start up/shut down after Airtime install

Suppress global warning messages. Clients should decide whether to print
or not.
CC-5108 : Waveform Editor UI

putting on the timescale for time reference.

fade editor now has cursor playback info.
Merge branch '2.4.x' of dev.sourcefabric.org:airtime into 2.4.x
CLRF fix.
CC-5175:
Now Playing: SQL syntax error happens when removing and add contents to current show.

-fixed
CC-5174: Linked Show: Update a regular show to linked show will move the whole scheduled time forward.
Updating de_DE .po file. Thanks to Silvio Mende
Updating de_DE datatables and plupload language files. Thanks to Silvio Mende
Removed CRLF
CC-5108 : Waveform Editor UI

making sure the correct li is activated when a track has a decoding error.
CC-5108 : Waveform Editor UI

error check for if both tracks cannot be decoded.
Merge branch '2.4.x' of dev.sourcefabric.org:airtime into 2.4.x
CC-5138: Linked Show: Time limitation exceeds when adding 24 hours smart block into daily repeating & linked shows

Calculate crossfades during insert instead of after
small modifications to make the waveform enabled in firefox 21 (playout does not work though)
Merge branch '2.4.x' of dev.sourcefabric.org:airtime into 2.4.x
CC-5109:
Fix race-condition when updating cc_pref table

-not a race condition..was a logic error.
CC-5049: Error messages on Liquidsoap start up/shut down after Airtime install

-fixed
CC-3822 : NowPlaying-> Time filter is allowing Start_Time be greater than the End_Time
Merge branch '2.4.x' of dev.sourcefabric.org:airtime into 2.4.x