Add jplayer media player

Jira issue: APPPARTY-21
Fixes an error in the README. Tilde is not parsed bij NodeJS, use $HOME instead.
Removes the 'skip item' button in the host.

Jira issue: APPPARTY-54
The indexer now adds a default image to a collection item when no readable album art is found.

Jira issue: APPPARTY-54
Merge pull request #24 from eelcocramer/APPPARTY-54

Adds a default cover art to the index when no cover art could be read from the media file
add screencast library

Jira issue: APPPARTY-21
Add player functionality to client

Jira issue: APPPARTY-21
Add Screencast functionality at the host

Jira issue: APPPARTY-21
cleanup of screencast code & layout fixes

Jira issue: APPPARTY-21
Merge pull request #25 from mjprins/streamBranch

Jira-ISSUE APPPARTY-21