Update docs

LISP.md

@@ -336,6 +336,7 @@ Here's a quick reference for common uniforms and stuff.
 
 ### Uniforms
 - Textures: `u_texture_<N>` is the Nth texture passed into the shader. It is a `uniform sampler2D`.
+- Previous: `u_previous` is the output of the previous frame in recurrent shaders.
 - Time: `u_time` is the time, in seconds, since the shader last started running. it is a `uniform float`
 - Resolution: `u_resolution` is the output resolution size, in pixels. This is a `uniform vec2`.
 

README.md

@@ -9,7 +9,13 @@ Once you've installed shadergraph via `cargo install shadergraph`, test to see t
 shadergraph --help
 ```
 
-This should print out some usage information. To run a shadergraph, if you're currently in the same directory as a standard shadergraph project, run:
+This should print out some usage information. To create a new project, run:
+
+```
+shadergraph new path/to/project
+```
+
+This will create a new example project in the specified directory. To run a shadergraph, cd into the directory of a project and run:
 
 ```
 shadergraph run