- Tag matching was being performed using the regex \b<tag>\b, which makes
taskwarrior dependent on regex lib bugs for basic functionality. This is
now modified to use pseudo-operators _hastag_ and _notag_.
- Arg now has a _value member that reflects the value in play, rather
than the input _raw value. Only _value is used in eval.
- DOM expansion capabilities are now controlled by rc.dom.
- The A3::Arg object is very similar to the E9::Term object, so the two are
being merged. First step is to separate A3::Arg into it's own space, then
add a _type member.
- Added more valid stop characters as terminators for various arg types.
- Removed redundant E9 special handling for dates, which is already built in
to the Date object.
