Updated readme (#42)

* Update the readme. Added a screenshot of the sample app.

* Fixed path to test config file

* Applied feedback received

* Applied feedback on readme

* Applied feedback on readme

Removed "questions" header

Author: miparnisari

Assets/sample_screenshot.png

@@ -1,31 +1,19 @@
 # Microsoft Face API: Python SDK
-This repo contains the Python SDK for the Microsoft Face API, an offering within [Microsoft Cognitive Services](https://www.microsoft.com/cognitive-services), formerly known as Project Oxford.
+This repo contains the Python SDK for the Microsoft Face API, an offering within [Microsoft Cognitive Services](https://azure.microsoft.com/en-us/services/cognitive-services/), formerly known as Project Oxford.
 
-* [Learn about the Face API](https://www.microsoft.com/cognitive-services/en-us/face-api)
-* [Read the documentation](https://www.microsoft.com/cognitive-services/en-us/face-api/documentation/overview)
-* [Find more SDKs & Samples](https://www.microsoft.com/cognitive-services/en-us/SDK-Sample?api=face)
+* [Learn about the Face API](https://azure.microsoft.com/en-us/services/cognitive-services/face/)
+* [Read the documentation](https://docs.microsoft.com/en-us/azure/cognitive-services/face/overview)
+* [More SDKs & Samples](https://azure.microsoft.com/en-us/resources/samples/?api=face&sort=0&service=cognitive-services&term=face)
 
-## Installation
+## Getting started
 
-```bash
-pip install cognitive_face
-```
-
-## Installation from Source Code
-
-```bash
-python setup.py install
-```
-
-## Unittests
-
-Before running unittests, please refer to the [/cognitive_face/tests/config.sample.py](/cognitive_face/tests/config.sample.py) and set proper configuration with valid [Subscription Key](https://www.microsoft.com/cognitive-services/en-us/sign-up) to make the unittests work.
+Install the module using [pip](https://pypi.python.org/pypi/pip/):
 
 ```bash
-python setup.py test
+pip install cognitive_face
 ```
 
-## Minimal Usage
+Use it:
 
 ```python
 import cognitive_face as CF
@@ -41,27 +29,47 @@ result = CF.face.detect(img_url)
 print result
 ```
 
-## Sample
+### Installing from the source code
 
-A Python SDK sample built with wxPython is also provided, before execution,
-please install all components listed below.
+```bash
+python setup.py install
+```
 
-### Sample Prerequisite
+### Running the unit tests
 
-- [Python 2.7](https://www.python.org/downloads/) (only Python 2 supported due
-  to limitation of wxPython)
-- [wxPython](https://wxpython.org/)
-- [cognitive_face package](https://pypi.python.org/pypi/cognitive_face)
+To run the tests you will need a valid subscription. You can get one [here](https://azure.microsoft.com/en-gb/try/cognitive-services/?api=face-api).
 
-### Sample Execution
+1. Copy `cognitive_face/tests/config.sample.py`  into `cognitive_face/tests/config.py`.
+1. Change the `KEY` and `BASE_URL` parameters to your own subscription's API key and endpoint.
+1. Run the following:
+
+```bash
+python setup.py test
+```
+
+## Running the sample
+
+A sample desktop application is also provided.
+
+To run it, install the following prerequisites:
+
+- [Python 2.7](https://www.python.org/downloads/) (version 3 is **not** currently supported, you can vote for this feature [here](https://github.com/Microsoft/Cognitive-Face-Python/issues/30))
+- [wxPython 3.0.2](https://sourceforge.net/projects/wxpython/files/wxPython/3.0.2.0/) (version 4 is **not** currently supported)
+
+Then run the following:
 
 ```bash
 git clone https://github.com/Microsoft/Cognitive-Face-Python.git
 cd Cognitive-Face-Python
+pip install -r requirements.txt
 python sample
 ```
 
+![Sample app](./Assets/sample_screenshot.png)
+
+
 ## Contributing
+
 We welcome contributions. Feel free to file issues and pull requests on the repo and we'll address them as we can. Learn more about how you can help on our [Contribution Rules & Guidelines](</CONTRIBUTING.md>).
 
 You can reach out to us anytime with questions and suggestions using our communities below:
@@ -71,7 +79,7 @@ You can reach out to us anytime with questions and suggestions using our communi
 This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/). For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or contact [opencode@microsoft.com](mailto:opencode@microsoft.com) with any additional questions or comments.
 
 ## Updates
-* [Face API Release Notes](https://www.microsoft.com/cognitive-services/en-us/face-api/documentation/ReleaseNotes)
+* [Face API Release Notes](https://docs.microsoft.com/en-us/azure/cognitive-services/face/releasenotes)
 
 ## License
 All Microsoft Cognitive Services SDKs and samples are licensed with the MIT License. For more details, see