* Add new contextualized API for hooks and steps
* Make default context configurable
* Run AfterStep hooks even after failed steps, fixes#370
* Update CHANGELOG and README
* Add step result status to After hook, fixes#378
* Elaborate hooks documentation
* Add test to pass state between contextualized steps
* Update README with example of passing state between steps
* Improved the help text of the formatter flag in the run command
* Made some more changes to the help text for the run command
* made some small changes to the help text of the run and build cmd