Change function order, public methods first, then private
Add ol.format.MTJSON

This format can read and write a minimized json
used in save/load transactions.  It contains:
routes, waypoints, detours, start, end and all
the step instructions.

It's currently only supporting the 'read' method.
The 'write' method hasn't been implemented yet.
Fix directions control to use ol.format.MTJSON

Currently only support reading, no writing.  It also
doesn't do anything with what's read yet.  At some point,
we'll want to load what we want to read from a remote server.
Add cadus-mtjson example

This example show the use of a MTJSON object/json, how
it's read. At some point, it will show that it loads what's
read in the map.