* Started using `State => State` actions instead of `ReleaseStep`s;
* Added `ReleaseBlock` notion;
* Construct release process from release blocks;
Added release notes
Minor logging fixes
Autogenerated markdown documentation
Setting version to 0.4.0-M4:

* Added `ReleaseBlock` notion
* Constructed release process from release blocks, it makes more check in the beginning
* Prettified release process logging
Setting version to '0.4.0-SNAPSHOT'