Focus v0.8.0

The roadmap is here https://trello.com/b/HTMYEYbX/roadmap
Please read the associated project's releases:

• Focus-components v0.4.0
• Focus-starter-kit v0.2.0
• Eslint config focus

new features

• Shared eslint-conf see #160
• Add a FocusException #161
• update npm scripts #162
• Fix unit tests #164
• Improve the store caller in status informations #165 , add a callerId in the action builder #166

bug fixes

• Fix error parsing issue #151 #152
• Fix number validator #159