added headers

README.md

@@ -6,10 +6,22 @@
 
 --------------------------------------------------------------------------------
 
+* `scatter_add`
+* `scatter_sub`
+* `scatter_mul`
+* `scatter_div`
+* `scatter_mean`
+* `scatter_min`
+* `scatter_max`
+
+## Installation
+
 ```sh
-pip install torch_scatter
+python setup.py install
 ```
 
+## Usage
+
 ```py
 from torch_scatter import scatter_max
 
@@ -30,3 +42,9 @@ print(argmax)
  1  4  3 -1 -1 -1
 [torch.LongTensor of size 2x6]
 ```
+
+## Running tests
+
+```sh
+python setup.py test
+```