Fixed build.xml, implemented media type templates

-build.xml now properly excludes mojo.jar

-Implemented metadata templates for each separate media type.

-Implemented Khris's media players for the different mediatypes.
Implemented PDF viewer, fixed contributor mapping

-Implemented new PDF viewer based on ViewerJS
(https://github.com/kogmbh/ViewerJS). Uses Iframe to embed the iframe.

-Implemented the increased space for the thumbnail for the related
items.

-Updated the latest styles provided by Khris.