PyOWM 2 stream Maintenance plan

Here is the timeline summarizing PyOWM 2.x fate:

PyOWM Branches
^
|                    3.0
|                 O---------------------->>>  
|
|  2.10              bugfix only
O-----------------O--------------X
|
|
'-----------------§--------------§---------> Time
              PyOWM 3.0       +1 year
             release date
	      (still TBC)