Fixed bug in Arduino wifi-examples (write was called rather than read in a network function).
Renamed index.js to app.js to match content of file (application object), added basic css styling for examples in common.css, moved application files to example base folder, moved external libraries (jQuery) to lib folder, rewrote SensorTag example to use high-level BLE library in easy-ble.js, and some small style fixes to HelloWorld example.