14.3 STMap
tests for chapter 15
Merge branch 'master' of github.com:fpinscala-muc/fpinscala

Conflicts:
	exercises/src/main/scala/fpinscala/localeffects/LocalEffects.scala
	exercises/src/main/scala/fpinscala/streamingio/StreamingIO.scala
	exercises/src/test/scala/fpinscala/streamingio/StreamingIOSpec.scala