Update readme.md
Merge pull request #30 from sebastianneubert/master

#4 Allow comparisson of images that do not have the same size
Added new exception when not Webdriver is not enabled
Added exception handling if an element does not exist
Merge branch 'master' of github.com:DigitalProducts/codeception-module-visualception
update codeception2 binary for tests. set executable flags for codeception bnaries.
Added ImageDeviationException as we need this to create great reports
Added ImageDeviationException as we need this to create great reports
merge conflicts and add incomplete test for writing current image to debug folder.