Remove old catalog.html
Updated demos page to the latest in vwf repository
Add downloads markdown file.
Update header to point to downloads.html
Remove legacy downloads.html page.
Add documentation.md file and update header link.
Add front matter to downloads and documentation
Add all documentation markdown files, and update to latest markdown standard. Create docs layout to concatenate into a single page. Add missing images. Remove outdated .html files.
Move index.js file to scripts content block and remove from footer page as it's not needed except on the home page.
Update installation documentation to latest in main vwf repository

refs #3149
Remove html tags from install.md that jekyll doesn't like

refs #3149
Rearrange scripts in index.html so they are all in "contentfor" block

refs #3149
Update formatting on demo page and remove unused css classes. Update links to point to master.virtual.wf. Update current sessions query to use jsonp so that it can pull from a different server. Checking in changes to query master.virtual.wf, but will require the update to master for a jsonp query in order to actually show current sessions. Right now it will throw a 404 error until that makes it way there.
Update Github to GitHub for proper capitalization.
Re-add typo changes that did not make it to the new website.
Fix install link in documentation. Minor formatting of the installation sections.
Update docs layout to keep documentation menu in a static position, and remove bullets. Still needs formatting work, but at least the menu is usable now.
Merge pull request #2 from virtual-world-framework/updates

Updates