BehaviorSubject subscription timegap fix
BehaviorSubject subscription timegap fix 2
Going lite
Some performance improvements
PublishSubject to match BehaviorSubject
Unified the Subject management.
Fix issue #1173
Fix the bug that the inner Subscriber can not be unsubscribed and elimilate scaladoc warnings
Update CompletenessTest.scala
Add sequenceEqual to RxScala
Add take variants to RxScala
Add takeRight(takeLast) variants to RxScala
Add timeInterval to RxScala
Update more mappings to CompletenessTest
Add delay variants to RxScala
Update range comments
Add using to RxScala
Add buffer variants to RxScala
use LinkedList to buffer the sequence’s items

LinkedList has guaranteed constant insertion time when appending to the end of the list, whereas ArrayList takes O(1) amortized, since a reallocation might be necessary to insert further items. Since no capacity was specified for the buffer, on Hotspot this would cause the array to reallocate after the first 10 insertions, on Android after the first insertion (since Android’s ArrayList uses a default capacity of zero.)

Since the buffer is copied to an ArrayList before emission, subscriber performance when working with the list should remain unaffected.

Refs #1141
Merge branch 'master' into rxscala-more

Conflicts:
	language-adaptors/rxjava-scala/src/examples/scala/rx/lang/scala/examples/RxScalaDemo.scala