doc: Add @abandonware prefix

May be reverted if upstream maintainance is transfered.

Change-Id: I32b214cf38213abe0dea286af01fd55771302fb9
Relate-to: kelly#97
Signed-off-by: Philippe Coval <rzr@users.sf.net>

README.md

@@ -18,7 +18,7 @@ $ npm install i2c
 
 ```javascript
 
-var i2c = require('i2c');
+var i2c = require('@abandonware/i2c');
 var address = 0x18;
 var wire = new i2c(address, {device: '/dev/i2c-1'}); // point to your i2c address, debug provides REPL interface