Add possibility to provide version (#46)

System/Version/GetVersion.go

@@ -0,0 +1,6 @@
+package Version
+
+// Gets Ocean's version
+func GetVersion() string {
+	return oceansVersion
+}

System/Version/HandlerVersion.go

@@ -0,0 +1,19 @@
+package Version
+
+import (
+	"fmt"
+	"github.com/SommerEngineering/Ocean/Shutdown"
+	"net/http"
+)
+
+// Handler for the access to Ocean's version
+func HandlerVersion(response http.ResponseWriter, request *http.Request) {
+
+	// Case: The system goes down now?
+	if Shutdown.IsDown() {
+		http.NotFound(response, request)
+		return
+	}
+
+	fmt.Fprintf(response, "%s", oceansVersion)
+}

System/Version/Variables.go

@@ -0,0 +1,5 @@
+package Version
+
+var (
+	oceansVersion string = `2.0.0` // Ocean's current version
+)