Add tentative Tizen implementation.
Native Tizen implementation of SplashScreen API.
Fix typo.
Fix syntax errors.
Fix path of Tizen's SplashScreenProxy file.
plugin.xml: Make sure splashscreen proxy is executed.
Proxy: Correct structure, and only ever create one splashscreen window.
Merge branch 'tizen' of http://github.com/siovene/cordova-plugin-splashscreen into dev