Create README.md

Author: elect86

README.md

@@ -1,8 +1,8 @@
 # kotlin-unsigned
 
-Unsigned operators and boxed types (Ubyte, Uint, Ulong and Ushort) for unsigned support.
+Unsigned operators and boxed types (`Ubyte`, `Uint`, `Ulong` and `Ushort`) for unsigned support.
 
-Gradle:
+[Gradle](https://jitpack.io/#kotlin-graphics/kotlin-unsigned/v2.1)
 
 - Add it in your root build.gradle at the end of repositories:
 
@@ -19,10 +19,18 @@ Gradle:
         compile 'com.github.kotlin-graphics:kotlin-unsigned:v2.1'
 	  }
 
+[Maven, Sbt, Leiningen](https://jitpack.io/#kotlin-graphics/kotlin-unsigned/v2.1)
 
 
-[Maven, Sbt, Leiningen](https://jitpack.io/#kotlin-graphics/kotlin-unsigned/v2.1)
+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:
+
+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)
 
 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 [elect86@gmail.com](mailto://elect86@gmail.com).