Added README

Readme.md

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+# Treimage
+
+A library to emulate an image out of trebuchets.
+
+## Terminal Usage
+
+```bash
+python -m treimage ~/Pictures/profile.png
+```
+
+| Flag          | Description                                                  |
+| ------------- | ------------------------------------------------------------ |
+| -h, --help    | Show this help message and exit.                             |
+| --shape SHAPE | The trebuchet shape (A, B, C, D)                             |
+| --color COLOR | The RGB value specified as "r,g,b"                           |
+| --scale SCALE | The multiplicative scale for the trebuchet height and width. |
+
+
+## Code Usage
+
+```python
+import treimage
+
+image_path = '/home/brandon/Pictures/profile.png'
+im = treimage.create(image_path)
+im.show()
+```
+
+Parameters
+```
+image_path: str
+    The path of the image that we wish to emulate.
+```
+```
+shape: treimagetrebuchet.FlexibleTrebuchet
+    Default: treimage.trebuchet.D
+    The trebuchet shape to use. Options: A, B, C, D.
+```
+```
+color: Optional[Tuple[int, int, int]]
+    Default: (26, 95, 138)
+    A RGB tuple containing 
+    the color of the Trebuchet tile.
+    If None, then we average 
+    the color of the surrounding area.
+```
+```
+scale: int
+    Default: 2
+    The multiplicative scale of 
+    the width and height ofa Trebuchet tile.
+```