Added ReadMe

ReadMe.md

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+# Game Of Life
+
+Im not explaining what a game of life is, its kinda cringe to see how much time it has taken me to create one...
+
+## Run it
+
+You need to download Rust
+
+Then you clone this repository
+
+And laucnh it with :
+
+```Bash
+cargo build --release
+
+cargo run --release
+```
+
+## Controls
+
+Left-Click : add one alive cell
+
+Space : Start/Stop simulation
+
+## How to play 
+
+Add cells when the simualtion is not started and then start it 
+You can even add some while its running, its kinda fun but you have to start with some before or it wont work because its too fast