Added Codacy badge

D, could do better :(
Added PartialFunction[A, B].either: A => Either[A, B]
Refactored inputStream
Added Tuple2.tmap
Merge branch 'master' into 2.9

Conflicts:
	core/src/main/scala/pimpathon/function.scala
	core/src/main/scala/pimpathon/java/io/InputStream.scala