Finalizing Conjunction API pt. 2

• Finalizing the asilib.Conjunction API
• Added asilib.Conjunction.intensity method. Depending on if the box argument is specified or not, this method will calculate either the auoral intensity for the nearest pixel to the footprint (box=None) or in a rectangular area around the footprint otherwise (e.g., box=(10x10)).
• Added tests for asilib.Conjunction.map_azel().
• Angular distances in asilib.Conjunction.map_azel() (and elsewhere) are now calculated using the Haversine equation.
• Moved original examples to examples/v0/ folder and started writing the examples using Imager() and Conjunction() to the examples/v1/ folder.