[+] StbMainApp: Add channel finding in service list.

Add downloading servise list from server.

Signed-off-by: Anton Sergeev <Anton.Sergeev@elecard.ru>

Conflicts:
	StbMainApp/src/analogtv.c
[*] StbMainApp: Refactor dvb channel list code.

Use linux list for handling dvb channels. Allocation of memory occur dinamicaly.
Channel count in playlist is not limitied (but there is simple limit at 512 on sorting channels).

Signed-off-by: Anton Sergeev <Anton.Sergeev@elecard.ru>

Conflicts:
	StbMainApp/src/analogtv.c
	StbMainApp/src/app_info.c
	StbMainApp/src/off_air.c
	StbMainApp/src/off_air.h
	StbMainApp/src/output.c

Conflicts:
	StbMainApp/src/analogtv.c
	StbMainApp/src/off_air.c