Name refactor: replaceOptions() -> replaceInline()
- Implemented 'Replacements'.
- Vim styntax highlighter: Replacement definition highlighting.
- Vim styntax highlighter: Highlight existential macro invocations.
- Vim styntax highlighter: Name refactoring.
- Default non-empty title in header.rmu
Refactoring: use 'this' instead of passing it explicitly.
- Documented 'Replacements'.
- Vim syntax highlighter: do not highlight replacement definitions
  inside comments.
- Documentation updates.
- Name refactoring.
Replacements tests.
Macro and Replacement definitions are not processed if the Safe Mode
is non-zero.
Added Replacements test.
Implemented user defined Quote definitions.
Documented Quote definitions.
Documentation updates.
Allow replacements in replacement match groups.
- Revert to only allowing special character substitution in
  replacement parameters (reverse previous commit) because it is
  inconsistent (does not allow quotes and depends on replacement
  definition ordering.
- Documentation erratum.
Vim syntax highlighter: Added Quote Definition highlighting.
Documentation updates.