Added text element, order and resize factor options, reviewed resizing system
Added text element, order and resize factor options, reviewed resizing system

- Added support for text element
- Order option for every element
- Resize factor option for every element
- `size` is expressed in percentage. Use a string with units (ie. 100px)
to force a fixed size.
- `maxSize` and `minSize` are always assumed a percentages
- Set `size` option to `false` to disable elements resizing and rely
only on classes

gasparesganga/jquery-loading-overlay