Fixed a typo in the email address for proposing a session.
Merge pull request #103 from thomasgohard/fix-email-typo

Fixed a typo in the email address for proposing a session.
Replaced the PNG logo with an SVG.
Merge pull request #104 from thomasgohard/add-svg-logo

Replaced the PNG logo with an SVG.
Change the banner foreground color to a dark grey.