* Exclude test files from flake8 check

* Fix flake8 for main files

* Add flake8 check to build

* Update some comments

* Cleanup and remove some duplicate initialization

* Fix some comments quotation and little bugs: raising Exception instead of raising Failure, random.randrange(a,b) instead of random(a, b)

* Fix some comments quotation and remove explicit inheritance from object

* Fix 'r' in front of the ```parse_csv``` comments

* Fix quotation in comments

* Fix quotation in comments and fix bug in 'KB_AgentProgram'

* Model for ContinuousWorld

* Added PolygonObstacle Class

* Added HTML for Continuos World

* Added JS for Continuous World

* Implemented ContinuousWorldView Class