surf: Migrate SUN/216 to new document format

+ Can not have htmlref entries in figure captions
+ Switch \em to \emph and \it to \textit (and more)
+ ^\wedge was causing problems in SCUCAT so just use \wedge

There seems to be an issue with \sstitemlist inside \sstsubsection
where the list overwrites the sentence introducing the list in the PDF
(see the REMSKY and SCUBA2MEM parameter lists).