* Update search.py

* Update test_search.py

* minor edits and notes

* removed fuzzywuzzy

* Add 8-Queens Test

* Optimization without veering from pseudocode

* Variable renaming

* Update search.py

* Optimization

* Update test_search.py

* Fairer reproduction

* Add flake8 config file

* Fix flake8 for test files

* changes a typo of file name to /aima-data

* modified some documentaion and removed doc tests

* changed the names like Fig[2, 3] and added unit tests for search.py

* adds Fig[4.23] graph which is 1-dim state space problem

* adds LRTA star agent class

* adds fully implemented LRTA star agent

* adds tests for LRTA star agent