Fix urls by removing double dashes

There were some headings that had a double dash in the url whereas they
should have a single dash.
Merge pull request #56 from nickbabcock/fix-urls

Fix urls by removing double dashes
Add biographies to the executive board page

Collaborators will need to `npm install` again to update to the latest
dependencies.

Closes #54
Closes #57
Fix typo in funding
Merge pull request #58 from nickbabcock/add-biographies

Add biographies to the executive board page
Better mobile experience viewing bios

Previously the formatting was very off due to how the css was structured.
Merge pull request #59 from nickbabcock/bio-mobile

Better mobile experience viewing bios
Fix case sensitivity with image extension

Windows is a case insensitive operating system and linux is case
sensitive. Thus when developing on windows all the pictures displayed
correctly, but when deployed onto a linux file system the images turned up
missing because the webserver was expecting a file with an extension of
".png" and not ".PNG"
Merge pull request #60 from nickbabcock/fix-extensions

Fix case sensitivity with image extension
Update Neal & Sophie bios