KML example improvement

Adding polygons in the KML example in order to use the polyStyle option.
Ticket : #2458
Fix typo, this is a follow-up from #1346
Merge pull request #1349 from bartvde/wpsfix2

Fix typo, this is a follow-up from #1346
Merge pull request #1348 from leorocher/branch-1

KML example improvement
Very small doc fix

Fixed a minor spelling mistake
Merge pull request #1350 from nachouve/patch-1

Very small doc fix