Implementation of GA in notebook search.ipyinb (#489)

* Update learning.py

converted method sample(self) to propety and removed the call in the statement return self.sampler

* Update search.py

minor code formatting.

* Implmented GA

Implemented Genetic Algoritm in search.py and search.ipynb

* implemented Genetic Algorithm in search.py and made modifications according to flake8. Demonstrated the working of GA iin search.ipynb.

* implemented Genetic Algorithm in search.py and made modifications according to flake8. Demonstrated the working of GA iin search.ipynb.

* Updated GA in search.ipynb

Removed the image links and included the images used in the image
folder. Reduced the file size from 2.4 MB to 183 KB. For every 21 print
statements that we previously had, now we have 2, only printing the
fittest individual in each generation. The instructions has been made to
get the detailed output.

* Delete aima-python.iml

* Delete misc.xml

* Delete modules.xml

* Delete workspace.xml

* Update learning.py

* Update search.py

* Add files via upload