Add HTML preview of files containing Trac Wiki markup, provided they have a {{{svn:mime-type}}} property set to {{{text/trac-wiki}}} or {{{application/x-trac}}}. 
Add HTML preview of files containing Trac Wiki markup, provided they have a {{{svn:mime-type}}} property set to {{{text/trac-wiki}}} or {{{application/x-trac}}}. 

Should close #1520.

git-svn-id: f68c6b3b1dcd5d00a2560c384475aaef3bc99487@1611 af82e41b-90c4-0310-8c96-b1721e28e2e2

moreati/trac-gitsvn,dafrito/trac-mirror,moreati/trac-gitsvn,moreati/trac-gitsvn,dafrito/trac-mirror,dokipen/trac,exocad/exotrac,dafrito/trac-mirror,exocad/exotrac,moreati/trac-gitsvn,dokipen/trac,exocad/exotrac,dokipen/trac,dafrito/trac-mirror,exocad/exotrac