Make landing page for link from CR community ads (and in general)

[Phrancis]

It looks like we are going to be part of the CR community ads based on votes we are currently 2nd only behind the good people @ Rubberduck. We should have a nice landing page that carries over the message from the ad in more detail, along with links to various things for interested parties to "get started".

Link to community ad

[Phrancis]

Here are some smaller steps in order to achieve this larger one:

• Rename the current index.html
• Update links in the menus and test
• Import resources for the new landing page (reference App Plus theme from ThemeWagon which @Phrancis and @marcandregirard have a copy of)
• Re-map index.html to the new landing page
• Add content and images to the new landing page

[marcandregirard]

I think this may be done since you merged landing-page in master 👍