* Bumped version number to 0.5.0

* Remove unneeded test

* Fix error in examples/ibm.py

* Add documentation for **kwargs for CircuitDrawerMatplotlib

* Update setup.py license header

Co-authored-by: Damian Steiger <damiansteiger@users.noreply.github.com>

* Fix some issues with builtin modules and fix some warnings

* Move generated documentation files into dedicated folder

Co-authored-by: Damien Nguyen <damien1@huawei.com>

* Accept keywords arguments for Matplotlib drawing

* fix circ drawer when depth == 1

Co-authored-by: Damien Nguyen <damien1@huawei.com>

* Backend implementation for aqt trapped ion quantum computer.

* testing files for aqt backend

* major fixes on testing files

* minor fixes

* remove requierement for external mapper; bug fixes

* syntax cleaning

* name fix

* Added setup for AQT backend

* Reindent files

* Fix typo

* Add setup for AQT backend

* Increase test coverage for _aqt.py

* Increase test coverage

* Code cleanup and increase test coverage

* More code cleanup and adjust license year

* Final test coverage increase

* fix comments

* fixes on aqt setup test

* revert bug

Co-authored-by: dbretaud <logiciqt@gmail.com>
Co-authored-by: Damien Nguyen <damien1@huawei.com>

* update ibm backend protocol and cleanup ibm files

* update README regarding ibmq

* Reindent _ibm_http_client.py

* Some code cleanup

* Ignore signal handler for test coverage

Co-authored-by: dbretaud <logiciqt@gmail.com>
Co-authored-by: Damien Nguyen <damien1@huawei.com>

* Add histogram plotting function for Simulator

* Apply suggestion to projectq/libs/__init__.py

* Apply suggestion to projectq/libs/hist/__init__.py

* Update _histogram.py

* Apply suggestion to projectq/libs/hist/_histogram.py

* Apply suggestion to projectq/libs/hist/_histogram.py

* Add docstrings

* All suggestions applied.

* Minor fixes for _histogram.py

* Minor modifications to _histogram_test.py

* Check that some message was printed in case of too many qubits

* Update __init__.py

Trigger Travis-CI

* Add print_function for Python 2.7

* Remove unsupported 'flush' keyword for Python 2.7

* Update bellpair example with histogram plot of probabilities

* Add support for other backends

* Update IBM examples with histogram plots

* Fix error in conf.py

* Increase test coverage

Co-authored-by: Ari Jordan 80055203 <ari.jordan@huawei.com>
Co-authored-by: Damien Nguyen <damien1@huawei.com>

…ProjectQ-Framework#368)

Co-authored-by: dbretaud <logiciqt@gmail.com>