Encapsulate regex filtering in amifilter.AMIRegexFilter
Compile re and improve method documentation
Rename 'search' module to 'amifind'
Add option to merge modified regions or replace completely in a filter.
Adjust package import to reflect rename of 'search' to 'amifind'
Add method to sort list of AMIs
Move mappings to separate module
Support sorting and retrieving a single image (first or last) from results
Add sorting and rename main method to 'find'
Add test case to cover all regions