Hi,
some tests in test-org-colviews.el fail. If this patch is acceptable, I will send more to fix the other failed test cases. 

Let me know if I understand the test intent of this failed test case correctly. Below is a summary from my patch:

* lisp/test-org-colview.el (test-org-colview/columns-summary): Fix 23rd test case

This test sets 2014-03-04 to be current-time and then computes the
number of days between current-time and 2012-03-29. 705 days should be
expected. However, 705d 1h is given in the test case.


Thanks.