Add ability to remove contact.
Use CSS to define desktop notification image and use a PNG instead of ico.
Improved display of userid.
Moved inline styles to css and increased buddy picture capture size to 128x128.
Cleanup of icons.
Various presentation updates that improve conference use cases.
- Support multiple simultaneous up-/downloads.
- Support dragging / selecting multiple files.
- Only select first presentation automatically.
- Show download progress in control overlay.
Merge pull request #75 from fancycode/presentation_multi_downloads

Various presentation updates that improve conference use cases.
Merge pull request #73 from theurere/contacts-manager-remove-contact

Add ability to remove contact from contacts manager.
Rebuilt styles.