Sort json from registry into logical blocks

[pgronkiewicz]

We should sort the json that we get with features into logical blocks, e.x. adding repositories, apt-get install, pip install, etc

[pgronkiewicz]

This issue is about 2 topics:

1. Identify most common groups
2. Create a parser that will check the features (or parse initial Pazuzufile) and group them together

Most obvious cases would be:

• apt-get install
• adding repositories (e.x. add-apt-repository)
• pip/pip3
• sbt
• npm
• gem install