Merge pull request #2547 from fredj/proj-api

Export more functions from ol.proj.Projection

src/ol/proj/proj.js

@@ -149,6 +149,7 @@ ol.proj.Projection.prototype.getUnits = function() {
  * Get the amount of meters per unit of this projection.  If the projection is
  * not configured with a units identifier, the return is `undefined`.
  * @return {number|undefined} Meters.
+ * @api
  */
 ol.proj.Projection.prototype.getMetersPerUnit = function() {
   return ol.proj.METERS_PER_UNIT[this.units_];
@@ -183,6 +184,7 @@ ol.proj.Projection.prototype.getAxisOrientation = function() {
 /**
  * Is this projection a global projection which spans the whole world?
  * @return {boolean} Wether the projection is global.
+ * @api
  */
 ol.proj.Projection.prototype.isGlobal = function() {
   return this.global_;