Add Matt Iversen to team part (from OTS Melbourne)
Fix mailing list links

Also making mailing list file name consistent with others in handbooks
Fix erroneous internal links due to square brackets

Should fix the jekyll build warnings.
Also fixed non-coded path in blog-posts.md that
was preventing jekyll from building.
Fix plural typo
Merge pull request #115 from Ivoz/gh-pages

Fix jekyll build being broken