Roslibpy

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**Changed**

* The non-blocking event loop runner ``run()`` now defaults to 10 seconds timeout before raising an exception.

**Added**

* Added blocking behavior to ROS API methods, e.g. ``ros.get_topics``.
* Added command-line mode to ROS API, e.g. ``roslibpy topic list``.
* Added blocking behavior to the ``Param`` class.
* Added parameter manipulation methods to ``Ros`` class: ``get_param``, ``set_param``, ``delete_param``.

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**Changed**

* For consistency, ``timeout`` parameter of ``Goal.send()`` is now expressed in **seconds**, instead of milliseconds.

**Deprecated**

* The ``timeout`` parameter of ``ActionClient()`` is ignored in favor of blocking until the connection is established.

**Fixed**

* Raise exceptions when timeouts expire on ROS connection or service calls.

**Added**

* Support for calling a function in a thread from the Ros client.
* Added implementation of a Simple Action Server.

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**Changed**

* The non-blocking event loop runner now waits for the connection to be established in order to minimize the need for ``on_ready`` handlers.

**Added**

* Support blocking and non-blocking service calls.

**Fixed**

* Fixed an internal unsubscribing issue.

----------

**Fixed**

* Resolve reconnection issues.

----------

**Added**

* Add a non-blocking event loop runner.

----------

**Changed**

* Unsubscribing from a listener no longer requires the original callback to be passed.