tree 6fec709f68043b85f18350ed94a867b47b8f68a8
parent 6d2a3bbfe6f763eb222aa86b305fa2c6e66b7aba
author Allard Hoeve <allardhoeve@gmail.com> 1455113882 +0100
committer Allard Hoeve <allardhoeve@gmail.com> 1455266960 +0100

Nodes now have a `created_at` attribute

* Base Node object has `created_at` which indicates the `datetime` the
  node was launched/started/created.
* EC2, Digital Ocean, OpenStack fill this attribute.
* Nodes at drivers that do not (yet) support it have `NoneType` as date.
* Document changes.

closes #698

[GITHUB-698]

Signed-off-by: Allard Hoeve <allardhoeve@gmail.com>