Update plugins.md

Added Leaflet.Geodesic
Leaflet.MeasureAreaControl plugin pull request
Merge pull request #2792 from zvaraondrej/gh-pages

Leaflet.MeasureAreaControl plugin pull request
Merge pull request #2791 from henrythasler/patch-1

Update plugins.md
Implement #2702

Add map.eachLayer() to reference page
Merge pull request #2799 from Starefossen/patch-5

Documents map.eachLayer() function
Add comment to removeEventListener doc noting that arguments to removeEventListener must be the same as those passed to addEventListener.
Merge pull request #2810 from manleyjster/gh-pages

Add comment to removeEventListener in docs
Mention Leaflet.LineExtremities
Merge pull request #2819 from leplatrem/patch-13

Mention Leaflet.LineExtremities plugin
Added Leaflet.twoFingerZoom plugin
Merge pull request #2823 from aratcliffe/gh-pages

Added Leaflet.twoFingerZoom plugin
merge from leaflet