Documentation of web server handlers

Contents:

• Base handler
• Accounts handler
• Account tokens handler
• Account token handler
• Descriptors handler
• Descriptor handler
• Descriptor lists handler
• Portrait handler
• Persons handler
• Person handler
• Person descriptors handler
• Person lists handler
• Extractor handler
• Identify handler
• Verify handler
• Matcher handler
• Linker handler
• Lists handler
• List handler
• Liveness handler
• Config handler
• Docs handler
• Version handler