Create README.md

Author: elect86

README.md

@@ -2,6 +2,8 @@
 
 Unsigned operators and boxed types (`Ubyte`, `Uint`, `Ulong` and `Ushort`) for unsigned support.
 
+### How to get it:
+
 [Gradle](https://jitpack.io/#kotlin-graphics/kotlin-unsigned/v2.1)
 
 - Add it in your root build.gradle at the end of repositories:
@@ -24,14 +26,16 @@ Unsigned operators and boxed types (`Ubyte`, `Uint`, `Ulong` and `Ushort`) for u
 
 To have a quick idea what this library offers, take a look at the [tests](https://github.com/kotlin-graphics/kotlin-unsigned/blob/master/src/test/kotlin/unsigned/unsigned.kt)
 
-Hightlights:
+### Hightlights:
 
 Android compatible, sources compiled with java 1.7.
 
 All unsigned methods available for `int`s and `long`s on java 1.8 have been reported here. 
 
 These are offered directly on the corresponding [`Int`](https://github.com/kotlin-graphics/kotlin-unsigned/blob/android/src/main/kotlin/unsigned/java_1_7/int.kt) and [`Long`](https://github.com/kotlin-graphics/kotlin-unsigned/blob/android/src/main/kotlin/unsigned/java_1_7/long.kt) Kotlin primitives (with `infix` too)
 
+### Contributions:
+
 Don't hesitate to contribute to the project by submitting [issues](https://github.com/kotlin-graphics/kotlin-unsigned/issues) or [pull requests](https://github.com/kotlin-graphics/kotlin-unsigned/pulls) for bugs and features. Any feedback is welcome at [[email protected]](mailto://[email protected]).