Updating the README and adding the mac shell to run the tool

Author: Sanix-Darker

README.md

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+# <>PythonUpdater 
+
+## Presentation
+    This is a simple tool to update easily your python packages on your computer simple by launch it.
+    **YOU DON'T NEED TO RUN ANY COMMAND**.
+
+## How it's work?
+- The tool Check first if you have pip on your computer, if not it install it
+- The tool install and use pip-review to update your package automatically
+
+## How to use it?
+    You just need to launch one of the tool corresponding to your system:
+        - FOR WINDOWS: launch windowsPY.bat
+        - FOR LINUX: launch linuxPY.sh
+        - FOR MAC: launch macPY.sh
+
+    And all is done it self, all your packages is now UP TO DATE!
+
+## Author
+    - [Sanix-darker](https://github.com/sanix-darker)
+
+## Organization
+    - [Python-Cameroun](https://github.com/python-cameroun)
+
+## LICENSE
+    You are free to update, fork, modify this source code!

macPY.sh

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+python presentation.py
+python checkIfPipInstalled.py
+pip install pip-review
+pip review
+pip-review --auto