Adding FilmOn Social TV channel support

## Adding FilmOn Social TV channel support

### Problem

This command

	livestreamer filmon.us/alkidavid

return

	error: No plugin can handle URL: filmon.us/alkidavid
	

	
	
### Solution

Adding support for http://www.filmon.us/channels




### Exception

#### Non-existing channel name

The URL http://filmon.us/no_channel return the same page as http://filmon.us/alkidavid rather than a 404

This command

	livestreamer filmon.us/no_channel

return

	error: No streams found on this URL: filmon.us/no_channel
	
by reading the channel name in this meta property

	<meta property="og:url" content="http://www.filmon.us/alkidavid" />
	
because

* it's less confusing for the user that a non-existing channel return an error rather than the default channel "alkidavid"
	
	
	
	
### Packet identification

The values

	RTMP_URL = "rtmp://204.107.26.73/battlecam"
	SWF_URL = "http://www.filmon.us/application/themes/base/flash/broadcast/VideoChatECCDN_debug_withoutCenteredOwner.swf"

are in this packet

	3167	6.144329000	192.168.5.130	204.107.26.73	RTMP	2009	Handshake C2 | connect('battlecam/')

identified with the Wireshark display filter

	tcp.port == 1935