more docs and added the import_config.h file to controlle which c++ libraries are added

import_config.h

@@ -0,0 +1,21 @@
+#pragma once
+
+// #################
+// #    WARNING    #
+// #################
+//
+// ## Read the docs before change here things!! ##
+//
+// https://zenndev1337.github.io/Rust-for-Arduboy/
+//
+// Comment out the librarys you dont need.
+// This saves memory but be carful if the librarys are not defined
+// it will not export the given functions for the rust project.
+//
+// to save a good amount you can comment out
+// the ArduboyTones library if you don't need it.
+
+#define Arduboy2_Library ;
+#define ArduboyTones_Library ;
+#define EEPROM_Library ;
+#define Arduino_Library ;