Update README.md (#443)
Update README.md (#443)

* Update README.md

Update the docs badge.

* Update README.md

Change order of badges.

* Update README.md

Make documentation badge blue. Remove Swift badge.

watson-developer-cloud/ios-sdk,watson-developer-cloud/ios-sdk,tad-iizuka/swift-sdk,tad-iizuka/swift-sdk,watson-developer-cloud/ios-sdk,watson-developer-cloud/ios-sdk,tad-iizuka/swift-sdk,watson-developer-cloud/ios-sdk,tad-iizuka/swift-sdk,tad-iizuka/swift-sdk