Task

- Added ::get_float method for accessing numeric attributes.
Eval

- Updated Eval runtime diagnostics, so that all stack I/O is shown during
  evaluation.
DOM

- When attributes are accessed via DOM references, the value extracted is now
  imbued with the attribute type.
TW-186

- TW-186 Increase for numerical UDAs (thanks to Steffen Uhlig).
TW-249

- TW-249 Report filters don't allow parantheses (thanks to Philipp Woelfel).
TW-168

- TW-168 modification of due date relative to current due date (thanks to Dirk
         Sarpe).
TW-1316

- TW-1316 Some filter expressions require space before closing paren (thanks to
          Will Dietz).