Add HLSSettings.as to centralize default values of configurable settings
Add OSMF plugin customizable HLS settings
resolve https://github.com/mangui/HLSprovider/issues/159
Merge pull request #161 from fixedmachine/osmf_plugin_hls_settings

Add OSMF plugin customizable HLS settings
formatting
push swc/swf, change default customization params
related to https://github.com/mangui/HLSprovider/issues/159
update description
related to #159