Bumped version number to 2.2.0
Merge branch 'master' into 2.2.0

- after 2.1.1 release that went into master
Bug #1038

- Fixed bug #1038, which prints blank lines with bulk changes and when the
  verbose attributes does not specify it.
- Lines do a better separation between each changes also.
Code Cleanup

- Print a message in bulk change when the user choose not to denotate a
  specific task (more consistent behaviour with other bulk changes).
Documentation

- Manually added ChangeLog delta that wouldn't apply as a patch.
Bug #1038

- Cleaner solution (less code duplication and blank space only when a
  confirmation is needed) for bug #1038.
Enhancement

- Stop consider new tasks after quitting a bulk change.
Deprecation

- Removed deprecated 'fg:' and 'bg:' attributes, which involves code,
  documentation and tests.
- Cleaned out NEWS file.
- Cleaned out config import synonyms, which should have been deleted a while
  ago.
- Removed unused localized strings, but left the 'deprecated' one behind,
  because it will be needed.
Performance

- Moved an expensive operation inside an if statement.
Code Cleanup

- Remove duplicate modify call to TDB2.
- Check if quitting in bulk change only if permission fails.
- Correct test logic (the unit for each operation is the second, not the day).
- Consistency in test for feature.1013.t
- Correctly color deleted tasks.

test
Bug #1042

- Fixed a bug where the diagnostics command failed to detect missing
  external utilities on Solaris and NetBSD.
Documentation

- Clearer documentation on relative dates.
Merge branch '2.2.0' of tasktools.org:task into 2.2.0
Documentation

- typos in INSTALL file (thanks to Erik Wenzel)
Authors file
Code Cleanup

- Indentation.
Bug #1044

- 'task projects' discard now newly deleted tasks and it includes only filtered
  tasks for its summary.
Unit test

- Check that quitting when doing bulk changes ignores subsequent tasks.
Code Cleanup

- The symbols '@' is part of the tag and not a special delimiter (adding a new
  item makes it more explicit).
Enhancement

- When formating real numbers that are between 0 and 1, the width controls the
  number of characters that are shown (with width "4", "0.01234" is shown as
  "0.01").