Basic takeUntil implementation
Tests for TakeUntil
Implemented Operation Next
Updated Observable API
Renamed variable
Fixed bug in ranges
Merge pull request #165 from mairbek/range-fix

Fixed bug in ranges
Merge remote-tracking branch 'mairbek/next-new' into next-review
Add unit test testNoBufferingOrBlockingOfSequence

As part of reviewing the code I added another unit test.
don't throw exception on iterator.hasNext()
Merge pull request #166 from benjchristensen/next-review

Review of Next Operation
0.5.4
0.5.5-SNAPSHOT
Merge branch 'master' into TakeUntiFunctional

Conflicts:
	rxjava-core/src/main/java/rx/Observable.java
Refactored TakeUntil operator
Reimplemented Last operation
Basic MostRecent implementation
Unit tests for MostRecent Operator
Updated Observable API
Implemented GetIterator operation