directory modTimes are ignored and can't be changed even when different.

[odeke-em]

$ mkdir -p A/B/C/D A/D/E && drive push A
$ drive push A
Resolving...
Everything is up-to-date. # Expected
$ drive touch --recursive A
/A: 2015-11-06 20:16:47 +0000 UTC
/A/D: 2015-11-06 20:16:48 +0000 UTC
/A/D/E: 2015-11-06 20:16:48 +0000 UTC
/A/B: 2015-11-06 20:16:49 +0000 UTC
/A/B/C: 2015-11-06 20:16:50 +0000 UTC
/A/B/C/D: 2015-11-06 20:16:51 +0000 UTC
$ drive pull A
Resolving...
Everything is up-to-date # Unexpected
$ drive list A
d- owner       0.00B        0By5qQkvRAeV2TjhPdzVhNldJUjA        2015-11-06 20:16:49 +0000 UTC   /A/B                                              
d- owner       0.00B        0By5qQkvRAeV2Rmg0T2VwTzZPekk        2015-11-06 20:16:48 +0000 UTC   /A/D
$ ls -l A
total 3
drwx------+ 3 odeke ugrad 3 Nov  6 13:14 B
drwx------+ 3 odeke ugrad 3 Nov  6 13:14 D

[odeke-em]

Addressed by PR #464