Converting main methods to tests.
Converting main methods to tests.
Merge branch 'master' into answers
Converting main methods to tests.
Merge branch 'master' into answers
Converting main methods to tests.
Converting main methods to tests.
Merge branch 'master' into answers
Converting main methods to tests.
Merge branch 'master' into answers

Conflicts:
	src/main/scala/com/rea/typesafety/OptionExercises.scala
Converting main methods to tests.
Merge branch 'master' into answers

Conflicts:
	src/main/scala/com/rea/typesafety/ValidationExercises.scala
Converting main methods to tests.
Converting main methods to tests.
Converting main methods to tests.
Merge branch 'master' into answers

Conflicts:
	src/test/scala/com/rea/typesafety/ValidationExercisesSpec.scala