Cleans up the badge link mess in the README file.

Also fixes broken link to Travis page.
Merge pull request #9 from potherca/patch-1

Cleans up the badge link mess in the README file.
Update CONTRIBUTING.md
Adds link to PSR-2 in CONTRIBUTING.md file
Merge pull request #10 from potherca/patch-2

Adds link to PSR-2 in CONTRIBUTING.md file