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
Localization Support for Zoom Control
Code style adjusted for travis.
Again some whitespace removing. (Travis)
Adds Popup autoPanPadding(TopLeft & BottomRight) options. Fixes #1588
Merge pull request #1972 from albburtsev/issue-1588

Adds Popup autoPanPadding(TopLeft & BottomRight) options. Fixes #1588
'#1968 compiled interpolation'
Merge branch 'interpolation' of https://github.com/calvinmetcalf/Leaflet

* 'interpolation' of https://github.com/calvinmetcalf/Leaflet:
  '#1968 compiled interpolation'
clean up template interpolation code #1969
fix tempate interpolation test and build
minor cleanup
add GeoJSON rountripping of GeometryCollection and MultiPoint, close #1956
update changelog [skip ci]
fix resize tracking on multiple maps, close #1980
MsTouch needs preventDefault. Fixes #2000
Merge pull request #2002 from danzel/master

MsTouch needs preventDefault
fix accidentally commented out fix, #1980