ComboStrap - Release 1.15

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The release 1.15 is a quick bug fix release above the 1.14.

Raster Image Resizing by height was broken (ie 0x250). It has bad height and width ratio in the srcset url
Outline numbering didn't take into account the config%3Atoptoclevel
unformatted has an unknown display and was sending therefore a warning message.
webcode html output was escaped two times making it to print HTML and not rendering it.