Update README.md

Author: coolcatcoder

README.md

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 # FlexSharpUnity
- 
+An implementation of Nvidia Flex in Unity!
+
+## Intro:
+This library should allow easy developement in Unity using NvFlex in both dots and non-dots environments! (dots currently not done yet)
+
+## Current State:
+Currently this library is early in development, so far this is what has been done:
+- fluids
+- solver parameters
+- basic shape collisions (cube and sphere, no mesh support currently)
+- infinite planes (occasionally causes crashes though)
+- basic rendering (can render as spheres to a unity particle system currently)
+
+## How To Use:
+
+For the most basic example all you need is a flex container with planes setup for your particles to collide with, and then an emitter to emit fluid particles!
+I would highly recommend downloading the official NvFlex demo app and choosing the solver parameters based off of scenes from there (also check their manual, it is very helpful).