Update README to assume the master branch

Signed-off-by: Stephen Celis <stephen@stephencelis.com>

Author: stephencelis

README.md

@@ -5,7 +5,7 @@ A type-safe, [Swift][]-language layer over [SQLite3][].
 [SQLite.swift][] provides compile-time confidence in SQL statement
 syntax _and_ intent.
 
-[Badge]: https://img.shields.io/travis/stephencelis/SQLite.swift/swift-2.svg?style=flat
+[Badge]: https://img.shields.io/travis/stephencelis/SQLite.swift/master.svg?style=flat
 [Travis]: https://travis-ci.org/stephencelis/SQLite.swift
 [Swift]: https://developer.apple.com/swift/
 [SQLite3]: http://www.sqlite.org
@@ -123,7 +123,7 @@ install SQLite.swift with Carthage:
  2. Update your Cartfile to include the following:
 
     ```
-    github "stephencelis/SQLite.swift" "swift-2"
+    github "stephencelis/SQLite.swift" "master"
     ```
 
  3. Run `carthage update` and [add the appropriate framework][Carthage Usage].