Notes: Setup gui elements, began session infastructure.
Bugfix: Server sends serverId with proper property name
Bugfix: Fixed disabled button stykes for Classic Dark theme.
Notes: Rearranging structure of pre-loader dialogs
Notes: Moved player-logic inside of the session object. Marked a number of convenience accessors as deprecated (references should be updated). Generally cleaning up client structure.
Notes: Finished server and client infrastructure for transferring basic session information. Began work on client-side form (CSS and JS) for handling sessions.
Feature: JS Server now starts a 'Session'
Maintenance: Removed deprecated accessors for players (moved from argo.accessor to argo.session.accessor)
Feature: Now properly negotiates joining and creating sessions, and choosing a player as the GM.
Bugfix: Maintenance server properly outputs errors in debug mode.
Feature: Python server now supports the session dialog.
Merge remote-tracking branch 'origin/SessionDialog' into development

Conflicts:
	src/client-core/js/10-gui.js
	src/client-core/js/20-rtc.js
Bugfix: Resolved various issues stemming from SessionDialog merge.