Create README.md

Author: Sopiro

README.md

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+# Minecraft Square root Calculator
+
+Square root Calculator in Minecraft.  
+Project done at 20160712
+
+[Youtube video](https://youtu.be/HvhP6PfT-PQ)
+
+## Features
+- The algorithm used to calculate the square root value is "[long division method](https://www.google.com/search?q=square+root+long+division+method)", in korean "[개평법](https://namu.wiki/w/%EC%84%B8%EB%A1%9C%EC%85%88%EB%B2%95#s-2.2.1)"
+- My own conversion algorithm was used to convert numbers between Binary and BCD: [video](https://youtu.be/nwZJh3b39Bg)
+- Sequential Logic Circuit (It takes around 5 minutes to calculate one value)
+- input(0~1024), output (up to two decimal places.)
+
+## Samples
+|-|image|
+|:--:|:--:|
+|Circuit  | ![1](.github/1.png) |
+|Screen  | ![2](.github/2.png)|
+
+|input|result|
+|:--:|:--:|
+|2| ![3](.github/3.png) |
+|976| ![4](.github/4.png)|