Added readme.

README.md

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+# Script to buy house in FFXIV
+
+## Dependencies:
+
+You will need python:
+[https://www.python.org/downloads/]
+
+This works on python 3.9.1
+
+It also needs ``PyAutoGUI`` for mouse, keyboard and GUI control, and ``Pillow`` for image/screen processing.
+
+## Windows
+
+After you have installed python, run from below in CMD and Powershell: 
+
+```
+py -m pip install pyautogui
+py -m pip install Pillow
+```
+
+Or alternatviely:
+
+```
+py -m pip install -r requirements.txt
+```
+