Fix issue #1173
Fix the bug that the inner Subscriber can not be unsubscribed and elimilate scaladoc warnings
Update CompletenessTest.scala
Update more mappings to CompletenessTest
Update range comments
Fix the initialization order
Merge pull request #1178 from zsxwing/issue1173

Fix issue #1173
Merge branch 'master' into rxscala-more

Conflicts:
	language-adaptors/rxjava-scala/src/test/scala/rx/lang/scala/CompletenessTest.scala