examples: Update examples to use newer maa functions

* Use maa_init() before any other maa functions are called
* Use ioNN instead of gpioXX, Using mapping

Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>

examples/javascript/example.js

@@ -23,7 +23,7 @@
  */
 
 var m = require("maajs")
-
+m.init();
 console.log("maa version: " + m.get_version());
 
 var r = new m.I2C(20, 21);