5.1.0

• Some codebase restructuring
• Fixed bug where an index would get appended to files with extensions that only have one file being renamed (if not using a unique pattern)
• If a file to be renamed doesn't exist print a warning and continue instead of throwing an error.
• Allow multiple RegEx options to be specified
  • If multiple specified, the matches from the first RegEx option will come before the second and so forth
  • Can be used to filter out parts of the file name in specific order (See example 5 in the Readme)
• {{r}} variable added parameter so you can select a specific RegEx match instead of just the first
• Added EXIF pixel width and height variables