Rx

- Added Qt mainloop scheduler thanks to jdreaver.
- Bugfix, wse `threading.RLock` instead of `threading.Lock` since
`BehaviorSubject` may share lock with "child" operator at subscribe
time. Fixes 50

- Fix to preserve the original error message for exceptions 44, thanks
to hangtwenty
- Fixed bug in `combine_latest()`. Fixes 48.
- Added `to_marbles()` and `from_marbles()`. Available from module
`rx.testing.marbles`.
- Added [Getting Started](https://github.com/ReactiveX/RxPY/blob/master/notebooks/Getting%20Started.ipynb)
IPython Notebook.
- Added `share()` as alias for `publish().ref_count()`.
- Added error handling example at https://github.com/ReactiveX/RxPY/blob/master/examples/errors/failing.py

- Removed impl. of `merge_observable` and made it an alias of `merge_all`
- Bugfix for 40. Every subscription needs it's own iterator in `from_()`.
Thanks to hangtwenty.
- Bugfix in `from_string()` debug method.
- Added `TkInterScheduler.schedule_periodic()` thanks to pillmuncher. 39
- Bugfix for 35. Refactored `zip_array` to use `zip` instead.
- AsyncIOScheduler now works with Python-2.7 and Trollius. Fixes 37
thanks to hangtwenty.
- Added `with_latest_from` extension method 34. Thanks to pillmuncher.

- Transducers via `Observable.transduce()`
- `adapt_call` no longer requires the inspect module
- Support callable instance, instance method, and class method for `adapt_call`
thanks to succhiello.
- Added example using concurrent futures for compute-intensive task
parallelization, thanks to 38elements.
- Got chess example working again under Python 2.7 thansks to enobayram.
- Added example for async generator.
- Many PEP 8 fixes.

- Fixed bug in ScheduledDisposabledispose. Only dispose if not disposed
- Fixed typo in `Pattern_and`. Should be `Patternand_`
- Fixed bug. Replaced push with append in controlledsubject.py
- Refeactored `observer_from_notifier` to `Observer.from_notification`
- Added missing rx.linq.observable.blocking from setup.py
- Added missing rx.joins from setup.py
- Removed some non git files files that were added to the package by accident
- Added `Observableto_iterable()`
- Fixed examples. Use `debounce` instead of `throttle`
- Fixed wrong aliases for `select_switch`.
- Added join patterns. `Observable.when` and `Observableand_`
- Added `BlockingObservable`and operators `for_each` and `to_iterable`
- Started adding docstrings as reStructuredText in order for PyCharm to infer
types. Operators will eventually be converted to new syntax
- Refactored operators to use C like extensionmethods using function decorators
- More PEP8 alignment

- Python slicing and indexing of observables. Thus you can write xs[1:-1:2]
- Aligned backpressure with RxJS
- Renamed all `select()` to `map()` and `where()` to `map()`
- `from_` is now an alias for `from_iterable`. Removed `from_array`
- Fixes for `flat_map`/`flat_map`. Selector may return iterable