Implement basic structure of our ls2 service interface

Signed-off-by: Simon Busch <morphis@gravedo.de>
Implement basic webapp management structure

* We're going to use the navigatorQt object for communication between the QtWebProcess
  which is running the application and the WebAppMgr rather than using an injected bundle
* We have to name our binary the same as the old WebAppMgr as otherwise we have to patch
  luna-serivce2 for just another securit exception.
* Using the cmake-webos-modules enables us to easily provide the needed webOS
  configuration files like the ls2 ones.
* Currently a application can only be launched once

Signed-off-by: Simon Busch <morphis@gravedo.de>