Update 'initializeForm' example.
Update 'initializeForm' example.

Copy and paste the example of  ```initializeForm``` and feel the power of XLForm immediately. =)
KitmanLabs/XLForm,markrickert/XLForm,sportlabsMike/XLForm,Tobiaswk/XLForm,xmartlabs/XLForm,xmartlabs/XLForm,MiMo42/XLForm