DigitalLatin/guidelines: Version 1.3.0

This release includes the following:

• Corrected typos in section on linking;
• Revised section on linking;
• Revised section on the apparatus fontium;
• Added links to resources in the DLL Catalog for identifying numbers for authors and works;
• Expanded a note in the section on the structure of an LDLT edition;
• Added "with @type="siglum"" in sections on human- and machine-readable sigla, listing manuscripts, Combining the Two Forms of Manuscript Description, and sections on bibliography;
• Added requirement that divisions have unique @xml:id in section on the structure of prose and poetry texts;
• Revised the section on people to require <persName> inside of <lem> or <rdg>;
• Revised the section on places to require <placeName> inside of <lem> or <rdg>;
• Replaced special characters used for editorial additions with < and >;
• Added a section on reporting extraneous text in a witness.