Reconstructed the import field type.
Changed descriptions in the comments.
Fixed an issue with the getSRCFromPath() method that the string '/./' was inserted in the url.
- Swapped the parent relationship of the WPUtility and Utility classes.
- Added a method to escape characters of the result of the generateAttributes() method.
Made the sub-fields to merge with the main-field recursively to support the attributes array conversion.
Reconstructed the image field type.
Reconstructed the media field type.