Persist Player Volume in global config + fix track refresh (Fixes #43)

- To prevent undefined value of extracted cbc key at first run the conf() object is refreshed at every access
- To allow playback behind corporate proxies the 'secure' flag was added

Fix Share All button only shared focused tracks

The following url shall now be handled by dzr
You can triger them from `xdg-open my-url`

    vscode://yne.dzr/pause
    vscode://yne.dzr/play
    vscode://yne.dzr/load # load next track
    vscode://yne.dzr/load?[0] # load track at [0]
    vscode://yne.dzr/add?[[76533108,76533118]] # add 2 track by id (used by  "copy link" menu)

vsix: can run in secure mode + better queue

vsix: run locally even when on remote

fix dzr-srt + use specific icon in vscode action-bar

Add MediaHandler

publish VSIX

move queue to side bar