added plugin code as provided by Adap.TV
added jwplayer SDK as submodule
cosmetic
added README with many useful links
added basic build Makefile
added volume and mute support
added jwplayer_id as argument to all callbacks
added license agreement (MIT)
linked IPlugin6::id() to actual SWF filename (as this is the undocumented requirement)
Merge branch 'release/v1.0.0'