docs: doc new types in user_guide; alphabetize types in reference. user_guide.txt: Removed Number from String and Number Properties. Added new Integer and Number Properties sections to the user guide. Number Proprty formats defined: no thousand separators, '.' decimal separator, supports scientific 2E4 style input. Ordered in rough order of use. reference.txt: Alphabetized the types in the reference manual for easy lookup. Fixed sentence on quiet property.