Migrate documentation from Wiki to GitHub and Enable Release Drafter

.github/release-drafter.yml

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+_extends: .github
+tag-template: python-$NEXT_MINOR_VERSION

README.md

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+# Python plugin for Jenkins
+
+[![Jenkins Plugin](https://img.shields.io/jenkins/plugin/v/python.svg)](https://plugins.jenkins.io/python)  
+[![Jenkins Plugin Installs](https://img.shields.io/jenkins/plugin/i/python.svg?color=blue)](https://plugins.jenkins.io/python)  
+
+Adds the ability to execute Python scripts as build steps.  Jenkins environment variables can also be utilized in the script as described below.  
+**Note**: It is expected that the Python interpreter is available on the system PATH.  
+
+## Usage  
+1. After installing the plugin, go to the job configuration page and select "Execute Python Script" from the "Add build step" drop down menu.  
+2.  Enter Python code.  Note that this defaults to the systems "python" interpreter.  The below Python code can be used to see what this is.  
+```python
+import sys
+
+print("Python version: " + sys.version + "\n")
+print("Python Path: \n" + str(sys.path))
+```
+## Example with Jenkins Environment Variable  
+If needed, Jenkins environment variables can be assigned to a Python variable as follows:  
+```python
+import os
+
+job_url = os.environ['JOB_URL']
+print("Jenkins Job URL is: ", job_url)
+```
+
+## Note on Python 3 - Linux  
+Many Linux distributions have "python" set to Python 2 as default.  This can be changed to Python 3 as shown below.  
+**Note**:  These commands are set system wide and will effect all users.  This is currently required for this plugin.   
+**Note if using Node**:  These commands will need to be run on the respective node.  
+```
+# Use below to see "python" and "python3" versions.
+python --version
+python3 --version
+
+# If no python3 version is present, install the desired Python 3 version
+# Example with Python 3.7
+sudo apt update
+sudo apt install python3.7 -y
+
+# Show python versions available 
+ls /usr/bin/python*
+
+# Check if any Python alternatives exist
+update-alternatives --list python
+# If a Python 3 alternative is shown that you would like to use, you can use the "sudo update-alternatives --config python" command to select it.
+# If none exist this will result in following error: update-alternatives: error: no alternatives for python
+
+# If no alternatives are present, create one for the respective Python 3 version - Python 3.7 used in this example:
+sudo update-alternatives --install /usr/bin/python python /usr/bin/python3.7 1
+
+# python --version should now show Python 3.7
+
+# Optional: If needed, another alternative such as "python2" could be created to allow use of Python 2 on the system as follows:
+sudo update-alternatives --install /usr/bin/python python2 /usr/bin/python2.7 1
+# "python2 --version" should now show Python 2 version.  Then "python2" can be used to run Python 2 scripts or interpreter.
+```
+
+## Note on Python 3 - Windows  
+Python 3 gives the option on Windows to install the "Python Windows Launcher" which is called with the "py" command.  
+This plugin does not currently support this, as it is only calling "python" to load the interpreter.  
+
+Issue can arise if both Python 2 and Python 3 are added to the system PATH as both versions use the same name for the executable - "python.exe", in which case Python 2 is generally called.  
+A quick workaround would be to remove Python 2 from the system PATH.  Python 2 could still be used outside Jenkins by creating a Python virtual environment or using a package such as [pyenv-win](http://example.com) to manage Python versions. 
+
+## Screenshots
+![](docs/images/python_plugin_example.jpg)
+
+## Release Notes
+
+See [GitHub Releases](https://github.com/jenkinsci/python-plugin/releases).

pom.xml

@@ -11,7 +11,8 @@
     <packaging>hpi</packaging>
     <version>1.4</version>
     <name>Python Plugin</name>
-    <url>http://wiki.jenkins-ci.org/display/JENKINS/Python+Plugin</url>
+    <url>https://github.com/jenkinsci/python-plugin</url>
+
     <developers>
         <developer>
             <id>rtyler</id>