Massive commit on iteration as one
Fixing the runner.
Added IterationRunner as a class, and some docs
Fixed failing tests
Changed path_regex and added case for undefined response
Added some documentation
Added an error handler class, some docs and UT for var processor
Refactored iteration runner
DRYed the response handlers
Fixed PR comments
Fixed linting errors
Fixing Linting error's.
Rectifying problems with merge.