Add delegated as base for future libsodium bindings, update travis yml to include it, start updating readme

multiplatform-crypto-libsodium-bindings/src/jsMain/kotlin/libsodium.kt

@@ -0,0 +1,28 @@
+@file:JsModule("libsodium-wrappers-sumo")
+@file:JsNonModule
+package ext.libsodium
+
+import org.khronos.webgl.Uint8Array
+import kotlin.js.Promise
+
+
+/**
+ * Created by Ugljesa Jovanovic
+ * ugljesa.jovanovic@ionspin.com
+ * on 25-May-2020
+ */
+
+@JsName("ready")
+external val _libsodiumPromise : Promise<dynamic>
+
+external fun crypto_generichash(hashLength: Int, inputMessage: Uint8Array) : Uint8Array
+
+external fun crypto_hash_sha256(message: Uint8Array) : Uint8Array
+external fun crypto_hash_sha512(message: Uint8Array) : Uint8Array
+
+external fun crypto_hash_sha256_init(): dynamic
+
+
+
+
+