Moves the implementation from a stub app2app api to the webinos app2app api.

Jira issue: APPPARTY-8
Updates the readme to reflect the move to webinos apis.

Jira issue: APPPARTY-8
Disconnects from the channel when navigating away from the page added for both host as client.

In case of the host this will remove the channel from the pzp and will make the channel unavailable for all connected clients.

Jira issue: APPPARTY-8
Improves the documentation and some small improvements of the code

Jira issue: APPPARTY-8
Removes the A2A stub

Jira issue: APPPARTY-8
Fixes issue where message is sent mulple times

Jira issue: APPPARTY-17
Fixes issue where message is sent mulple times

Jira issue: APPPARTY-17
For now we will allow all party guests to join by default

Jira issue: APPPARTY-8
Fixes issue where messages are always broadcasted on the channel

Jira issue: APPPARTY-8
Fixes typo

Jira issue: APPPARTY-8
Sends a message when a guest leaves the party channel

Jira issue: APPPARTY-25
Moves the implementation from a stub app2app api to the webinos app2app api.

Jira issue: APPPARTY-8
Fixes issue where message is sent mulple times

Jira issue: APPPARTY-17
Merge pull request #8 from eelcocramer/APPPARTY-8-REVISITED

Integrates party player with webinos app2app API