Use description markup in summary tables

[Synchro]

The recommendation summary table uses the full markup of whatever is put in recommendation or recommendation_summary tags, but the description and description_summary used in the finding summary table do not act the same way. For the most part these sections don't have much markup in, but lists and code markup are common, and it's a pity to lose them.

This is because the descriptions are inserted using <xsl:value-of select="findingDescription" />, which strips markup. This PR changes it to <xsl:copy-of select="findingDescription/node()"/> in 2 places, and <xsl:apply-templates select="description_summary" mode="summarytable"/> in another.

Tested in a real project, works nicely. Same fix applies to HTML rendering, but that doesn't get much use.

[Synchro]

I'm not sure why those 2 older commits are in here - they were merged last week!