* Added tests for information_content

Added some tests for information_content function from learning.py

* Added test for information_content

* Update learning.py

* Update test_learning.py

* Add test for TableDrivenVacuumAgent

* Debug Travis

* Minor fix

* Fixed table for TableDrivenAgent

* Update README

* Added Policy Iteration section

* Removed ambiguous test

* Capitalized header

* Added images

* Added section for sequential decision problems

* added overview for AdaBoost

* added implementation for AdaBoost

* added example for AdaBoost

* added tests for AdaBoost

* rephrased sentences

* final changes to AdaBoost

* changed adaboost tests to use grade_learner

* grammar check

* added submodule

* fixed ac3 in csp.py

* added a test to verify the modified ac3 algorithm in csp.py

* Update .gitmodules

* Update PeakFindingProblem code to allow diagonal motion

* Fix unit test issues

* update PeakFindingProblem to take actions as input param

* Refactor code in search.py

* probability notebook

* Update test_probability.py

* Update README.md

* add failure_test method to utils

* comment fix

* Update test_learning.py

* Update test_csp.py

* Update nlp_apps.ipynb

* Update test_text.py

* Added predicate_symbols

* Added FOIL

* Updated README

* Added tests for search.py

* Updated readme

* Removed extra newline

* Fixed seed

* Update README.md

* Added docstring for minimal-consistent-det

* add a simple naive bayes classifier

* Update test_learning.py

* spacing

* minor fix

* lists to strings

* Update nlp.py

* add chart parsing test

* add chart parsing section

* add cnf_rules to grammar

* Update nlp.ipynb

* Update test_nlp.py

* add more to CNF section

* Update nlp.py

* add CYK parsing test

* add prob-grammar to notebook

* Update nlp.py

* add weighted choice

* tests for prob grammar + generation

* add test for weighted choice

* Update nlp.py

* Update knowledge.ipynb

* Update test_knowledge.py

* add version-space learner + small fix

* add test for version-space learner + trivial example

* Update README.md

* Update nlp.py

* Update test_nlp.py

* Add files via upload

* Update nlp.ipynb

* add generate_random

* Update README.md

* add powerset to utils

* add powerset test

* Create knowledge.py

* Create test_knowledge.py

* add header docstring to knowledge.py

* update learning docstring

* minor edits in knowledge.py

* Fixed truncated_svd

* Moved SVD algorithm to learning.py

* Minor fixes

* Typo fix

* Update nlp.py

* Update test_nlp.py

* Update nlp.ipynb

* Update text.py

* Update test_text.py

* Update text.ipynb

* 'sentences' to 'samples'

* Added pl_resolution to notebook

* Added pl_resolution and FolKB to notebook

* Update logic.py

* unigram char model + rename text to word models

* Update test_text.py

* Update text.ipynb

* remove duplicate assert

* add RandomVacuumAgent + CompareAgents

* set random.seed

* Update test_learning.py

* Update learning.py

* Removes smalltest_kb

* Moved wumpus_kb to logic.py

* Added PropKB and tt_entails to notebook