Adding barcode magic commands:

Adding barcode magic commands:
 * updated magicbc.js to support the autofill mode (to fill in fields scanned into the barcode magic field.
 * added bcmagic/utils.py which contains quick functions for returning the correct dictionary expected by bcmagic.js.
 * added cmd_move_sample as first proof of concept command
   * Started a bcmagic/plugin.py which in the future will automatically look for bcm_cmds.py within each registered app and automatically add those commands to the processor.
   * provided samples/bcm_cmds.py as storage location for custom commands
   * started cmd_move_sample view and form