numberXXX from textNumberFormat changed to textNumberXXX

Fixed up grammar (double tables), dropped grammar for simple types (wasn't used anywhere) replacing it with a single grammar terminal 'simpleRepresentation' which is used for all the simple types.

Modified properties to refer to grammar terminals (some - not done comprehensively).

Moved sections from sequences that have to do with specified length, and pattern length that rightfully aren't just about sequences. These were moved up to the general section about Framing and length.

Change all boolean properties to enum 'yes''no'

Added textNumberGroupSeparator

Corrected Nils and Deafults on Unparsing table

Clarified the valid types for properties

Moved selectors to appendix

Added dfdl:inputValueCalc to unparsing property precedence.

Changed all examples to use 'eq' 'gt' rather than '=' '>'

Allow dfdl:lengthUnits 'characters' on complex elements

Allow escapeCharacter and escapeEscapeCharacater to be an expression.

outputNewLine can be an expression

fixed examples

added copyright statements for ICU and XPATH

change fn:count and fn:position to dfdl:count and dfdl:position