Test a GitHub web hook by fixing a typo in the README.

Just testing a web hook.
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>
Reformat source code with IntelliJ IDEA preset

Some of this may be slightly off but it's better than it was
Merge pull request #36 from Kobata/style-reformat

Reformat source code with IntelliJ IDEA preset
Merge pull request #20 from Grinch/patch-1

Update README.md, add CONTRIBUTING.md and run folders
Github's urls are case-sensitive
Need to add the link to the doc too