Fix issue #1 + add other scheme system

Keypair was badly tested. Now it's ok if user hasn't id_rsa key

Idok can now use other scheme (rtsp, http, etc...)
Change playback behaviour, version display and fix ssh problems
Change version to 0.2.6
Merge pull request #2 from metal3d/devel

Fixes and enhancements - 0.2.6