add avdevice55 as a dependcy instead of 53, which we need for utopic
remove annoying warning.
Update Ubuntu install instructions

Removed need to install snapshot version for latest Ubuntu now that 1.28 is packaged.
Fixed bug in rtsp streaming caused by a signed - unsigned conversion.
Add a stringVector join function for future use
Merge pull request #555 from manupap1/rtsp_fix

Fixed bug in rtsp streaming caused by a signed - unsigned conversion.

I like it. but please... somehelp help out with my comments above.
Fixed bug in rtsp streaming caused by a bad string concatenation
Merge pull request #557 from manupap1/rtsp_fix

Fixed bug in rtsp streaming caused by a bad string concatenation
Merge pull request #556 from ZoneMinder/add_join

Add a stringVector join function for future use
just update the perldoc parts
Update zoneminder.service.in

Fix restart issue when using systemd
Send keepalive messages if the rtsp server supports this feature
Use our own SSRC when sending packets on the control stream
Use our own SSRC when sending packets on the control stream
add comment to improve understanding
Merge branch 'master' of github.com:ZoneMinder/ZoneMinder
Merge pull request #561 from manupap1/rtsp_fix2

Use our own SSRC when sending packets on the RTP control stream
Merge pull request #560 from manupap1/rtsp_fix

Send keepalive messages if the rtsp server supports this feature
Merge pull request #550 from SteveGilvarry/patch-1

Update Ubuntu install instructions