Updated the example plugin.

[jrfnl]

• Added file header
• Localized and escaped the text string
• Applied best practices and coding standards
• Added readme.txt
• Added license file

Fixes #555

Tested & found working in WP 4.5

[GaryJones]

I can't easily see the diff, so feel free to merge it yourself.

[jrfnl]

I can't easily see the diff,

Yeah, I know, zip is not the best format for diffing, but it is the way it needs to be in the repo for the demo purpose for which it was included.

Would it be an idea to create a separate repo for maintaining the code of the example plugin ? That would make diffing a breeze when there would be updates (like this one).

so feel free to merge it yourself.

I'll give Thomas a chance to have a look at it first as it's in response to an issue he opened.

[GaryJones]

A separate repo makes sense.

[jrfnl]

A separate repo makes sense.

Created & given you both access. Initial commit is the original file, I've gone through the file history and found no other changes since.
Opened a PR TGMPA/tgm-example-plugin#2 for the changes contained in this PR.

[jrfnl]

Oh and just for the record: I've not committed the OSX artefacts which were included in the original zip to the new repo and have removed these from the zip file in this PR as well.