meta-luneui: replace cjson with json-c

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
luna-sysmgr: use json-c instead of cjson

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
README: update to depend on master branches

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
opkg: Rename .bbappend to match new version from oe-core

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
connman: Rename .bbappend to match new version from oe-core

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
python: remove modules which are now in meta-python

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>