Heavily modified tchart.py.
This is to support the following features, while taking away the selector
features. Tchart now checks against the version of taskwarrior.
-v flag toggles verbosity
-o flag allows output to a text file
-d flag sets the starting date of the report
-w flag sets the number of weeks to be covered
  1 Heavily modified tchart.py.
  2 This is to support the following features, while taking away the selector
  3 features. Tchart now checks against the version of taskwarrior.
  4 -v flag toggles verbosity
  5 -o flag allows output to a text file
  6 -d flag sets the starting date of the report
  7 -w flag sets the number of weeks to be covered