* Fix CONTRIBUTING.md github link reference.
* Full URL is provided to avoid relative/fork reference issues.
* Minor update on full contributing documentation.
Signed-off-by: Tomasz 'CeDeROM' CEDRO <tomek@cedro.info>
So far, the use of the new pull request template has been disastrous. People are ignoring the writing instructions the template is polluting the PR history. This change just removes the boilerplate and writing instructions fromt he template. We don't need to see this unmodified serveral times per day.