Updated reference to image to match GitHubs recommendations
Updated reference to image to match GitHubs recommendations

Reference: https://help.github.com/articles/relative-links-in-readmes/
railsware/Sleipnir,railsware/Sleipnir,railsware/Sleipnir,msdgwzhy6/Sleipnir,msdgwzhy6/Sleipnir,msdgwzhy6/Sleipnir