Merge pull request #1 from sergey-tihon/master

Logo was added
Merge pull request #2 from sergey-tihon/master

Fixed logo url in nuspec #1
Updated logo

This updates the logo to use the new F# Software Foundation logo for F#
instead of the # sign. For details, see
http://fsharp.org/foundation/logo.html
Merge pull request #3 from ReedCopsey/master

Updated logo
Fixed link to NuGet package