descripton display only action with callback
Merge branch 'services_description' into integration_dmr
CDS v4 varables definition
Merge branch 'services_description' into integration_dmr
check the instance and return error if not found
first step of GetMediaInfo
first step of Get_MediaInfo_Ext
Merge branch 'avts' of https://github.com/mchalain/libdlna into avts

Conflicts:
	src/avts.c
Merge branch 'avts' into integration_dmr

Conflicts:
	src/avts.c
set the last state variable to empty
Merge branch 'services_description' into integration_dmr
add the last variable entry as empty
Merge branch 'services_description' into integration_dmr

Conflicts:
	src/avts.c
AVTS manage the transitioning and the state modification
set avts response to action
extract didl API from cds.c
Merge branch 'didl' into avts
add didl source files
Merge branch 'didl' into avts
get media metadata