Added linear learner (#889)
Added linear learner (#889)

* Added linear learner in learning.ipynb

* Update learning.ipynb

* Update learning.ipynb

* Update learning.ipynb

Chipe1/aima-python,aimacode/aima-python,Chipe1/aima-python,jo-tez/aima-python,aimacode/aima-python,jo-tez/aima-python