This document walks through setting up Qlik Sense and IIS running on separate servers to produce a sheet mashup in an html page. The key theme here is making sure the proper authorization is passed to Qlik Sense so that the mashup content on the IIS web server renders properly.
Update 18-May-2015: Updated links to virtual proxy configurations. These were pointing to internal resources and not to the documents here on Community.
Update! Thanks to Joonas for finding a path issue with the source location for fonts. This has been addressed.