bindings: Rename dotnet project to UnicornEngine

Add a few more properties to prepare a nuget package

bindings/dotnet/UnicornEngine/ConvertUtility.fs

@@ -0,0 +1,21 @@
+namespace UnicornEngine
+
+open System
+
+[<AutoOpen>]
+module internal ConvertUtility =
+
+    let int64ToBytes(v: Int64) =
+        let res = Array.zeroCreate<Byte> 8
+        let mutable uv = uint64 v
+        for i = 0 to res.Length-1 do
+            res.[i] <- byte (uv &&& uint64 0xFF) 
+            uv <- uv >>> 8
+        res
+
+    let bytesToInt64(v: Byte array) =
+        let mutable res = uint64 0
+        for i = 0 to v.Length-1 do
+            let tmpV = v.[i] &&& byte 0xFF
+            res <- res + (uint64 tmpV <<< (i * 8))
+        int64 res