Revert "Fixed logo.svg."

This reverts commit 7c1d59dc65674f29ee60c210fb95799a2dbd65b8.
Revert 7c1d59d..4b4d18d

This rolls back to commit 7c1d59dc65674f29ee60c210fb95799a2dbd65b8.
Inserted logo.svg from rawgit.