Added the getPopup function to L.Marker
Removing temporary swap file that has accidentally added to previous commit
Adds support for altitude and 3D GeoJSON

This commit adds a third parameter to the L.LatLon class for specifying
altitude. This is in turn stored in the `.latitude` property for the LatLng
instance. Latitude property will only be set if the latitude parameter is not
undefined, this is done in order to ensure backwards compability.

```javascript
var latlng = new L.LatLng(10, 20, 30);
console.log(latlng.altitude); // prints '30' to the console
```

Similar functionality has been added to L.GeoJSON coordsToLatLng() and
latLngToCoords() methods in order to handle import and export of 3D GeoJSON.

```javascript
var geoJSON = {
  type: 'Feature'
  ,properties: {}
  ,geometry: {
    type: 'Point'
    ,coordinates: [20, 10, 30]
  }
}
var layer = new L.GeoJSON();
layer.addData(geoJSON);
console.log(layer.getLayers()[0].getLatLng().altitude);
```

`NB` It is important to notice that no logic has been added in order to prevent
latitude and longitude to change without appropirate change in altitude – this
must be handled by the application.
Renames L.LatLng property .altitude to .alt
Merge branch 'fixNoShiftClickAfterDrag'
Localization Support for Zoom Control
Code style adjusted for travis.
Again some whitespace removing. (Travis)
Merge remote-tracking branch 'upstream/master'
Adds Popup autoPanPadding(TopLeft & BottomRight) options. Fixes #1588
Use this._popupHandlersAdded to manage Marker popup event

Just like it's done in Path. This allows to cut event management on bindPopup
Merge pull request #1973 from yohanboniface/popupHandlersAdded

Use this._popupHandlersAdded to manage Marker popup event
Added Keycode 171 to support Firefox 22
Merge remote-tracking branch 'upstream/master'
Merge pull request #1981 from fastrde/fixFirefoxZoomIn

Added Keycode 171 to support zoomIn Firefox 22 & 23
call _onViewReset() not until map is loaded (center and zoom are set)
map.once doesn't get called when the map is already initailized and drag.enabled is called.
Test for dragging and worldCopyJump added
added a spec test for worldCopyJump set Center and Zoom fix #1982
Merge pull request #1982 from fastrde/FixworldCopyJump

Fix worldCopyJump set Center and Zoom first