Merge pull request #14 from Grinch/patch-1

Add build task to default tasks
Update pre-commit hook to only do license formatting
Update README PR guidelines

Based on feedback so far
Add Contribution Guidlines link to README
Merge pull request #16 from simon816/readme-guideline-link

Add Contribution Guidlines link to README
Update README.md, add CONTRIBUTING.md and run folders

Run folders are there so someone doesn't have to manually create them to
follow our instructions, they are excluded in the .gitignore so any
modifications in those should not be recorded by Git.

Signed-off-by: Steven Downer <grinch@outlook.com>