Merge branch 'release/0.7.2' into develop
Switch .sync to also utilize common _execute interface.
Merge pull request #32 from latestrevision/sync_to_execute

Switch .sync to also utilize common _execute interface.
Support datetime objects as input.

Add tests for datetime feature.

For #33.
Merge branch 'develop' of github.com:ralphbean/taskw into develop
Update the readme.
py3 compat.
Of course, handle unicode as well as byte strings here...
Test that unicode stuff.
Serialize incoming zoned date/datetime instances into strings of the appropriate format before relaying to taskwarrior.
Adding two additional requirements (sorry).
Fixing requirement name.
Minor modifications to annotation handling to support annotations in 2.3.0
Overriding _stub_task to preserve due date; display the actual error message when a task is not creatable.
Use string_types rather than basestring.
Removing unicode literal.
Use six.text_type rather than a unicode literal.
Use string_types rather than basestring.
Use six.text_type rather than a unicode literal.
Do not attempt to set parameters unless they are explicitly defined in the incoming data.