add web_advanced_search_wildcard module

Allows =ilike operator to advanced search option.
Use % as a placeholder. 
Example: "Zip matches 1%" gives all zip starting with 1
Also allows insensitive exact search.
Example "Name matches john" will find "John" and "john" but not "Johnson".

PR moved from OCA/server-tools https://github.com/OCA/server-tools/pull/56