Add mention of MAX_ZOOM setting
Mention where ZOOM limit is applied.
SWITCH DETAIL ZOOM on detail pages too

The zoom level where map switch from 'main' to 'detail' is also applied on TREK DETAIL PAGES maps. Not only on HOME, isnt it ?
REMOVING S to detail
Merge pull request #267 from camillemonchicourt/patch-5

Add mention of MAX_ZOOM setting