[tvheadend] int -> uint32_t
[tvheadend] process new optional webroot param in htsp hello.
[tvheadend] add support for new imagecache feature.
[tvheadend] create routine for generating web urls and use this in HTSPData.
[tvheadend] bump to 1.6.16
Merge branch 'pvr.hts'. closes #146
[tvheadend] fix win32 build