Moving file to top level of repo to be a single file that describes how
users can contribute to the snmachine project

These files allow for templating of issues and pull requests on Github
for easier contributions.

The layout is akin to:
	https://github.com/tallamjr/dotfiles/issues/new/choose
where one chooses an issue option, BUG, FEATURE_REQUEST, or just make a
general issue.

In addition, a PULL_REQUEST_TEMPLATE has been created to allow for
consistent documentation of what a PR achieves.

Fixes #126

In addition to Code Style section, further subsections have been added
such as:

	* Creating an Issue
	* Submitting a Pull Request
	* Running Tests Locally
	* Package Versioning

Some sections anticipate adoption of certain practises that have not
been implemented yet, such as CHANGELOG, but this should be in place in
due course. Therefore this commit links to #129

Closes #127

Moving instructions for how to update the contributors repo with
snmachine into a hidden comment, as opposed to being inline with the
check mark.

Since it is outlined in CONTRIBUTING.md that one should fork snmachine
and then make changes in their local repo, it is expected that they
should update the dev branch from "upstream"

As well as fixing typo and upper-casing github --> Github