* src/GrampsDBCallback.py: block recursive signal calls, improved error
reporting. All warnings are now printed to stderr even if logging
is turned off.
svn: r4328
* src/GrampsDBCallback.py: improved error reporting when there is an error in
a callback function. Added unittest for exception in callback function.
svn: r4305
* src/RelLib.py (Event.are_equal): Correction.
* src/Date.py (is_empty): Require empty text for a date to be empty.
* src/WriteXML (write_object): Remove places from Media.
* src/GrampsDbBase.py (undo): Typos.
* src/GrampsDBCallback: Pretty printing for warnings.
svn: r4297
* src/GrampsDBCallback.py: Added code to disable/enable signals on
a per instance or all instance bassis. Improved test code and
changed type checking to use isinstance instead of type().
svn: r4291
