Merge pull request #58 from christianchristensen/master

Move theme to bootstrap LESS configured AllPlayers-theme.
[38591771] Adding documentation for group registration widget.
Renaming files to format 2011-section-page.
Change source of porthole to pinned down version served from CDN.
Merge pull request #61 from arturo-c/widgets_group_registration

[#38591771] Adding documentation for group registration widget.
Adding example group registration widget to documentation.
Merge pull request #64 from arturo-c/widgets_group_registration

Add example iframe for group registration widget.
Update iframe height by +30px on window callback.
Add dashed border to iframe example on widget page
Explicit line break after iframe widget example.
Remove space in iframe example snippet.
Update event creation and return documentation: simple and complex events.
Update group register to join and clarify functionality.