Real Parsing
  define grammar for command line
  implement flex/bison parser
  new grammar includes:
    - task delete <ID> [<ID> ...]
    - task done <ID> [<ID> ...]

User-Defined Reports
  report.large=id,uuid,project,priority,entry,start,due,active,tags,description
  report.long=id,project,priority,entry,start,due,tags,description
  report.list=id,project,priority,due,active,description
  report.ls=id,project,priority,description

  Sorting is always: due+ priority- project+

  ID UUID Project Priority Entry Start Due Active Tags Description

Test Suite
  - allow .taskrc override
  - debug=on to cause all cout to be csv
  - regression tests for every bug, command, feature