Use github for dictionary changes.

[Alex Tweedly]

On 04/04/2016 00:34, Mark Wieder wrote:
>
> cd ~/livecode
> before trying to add a git remote
>
Thanks Mark - works fine now.

That gives me a great opportunity to improve the document on how to 
contribute - so I can use that as my test case for modifying the docs :-)
I have (I think) fixed this missing change of directory, and a couple of 
other minor problems, and submitted the request ...

-- Alex.