Allow API to modify "website creation date"
|Reported by:||matt||Owned by:|
Currently set to the timestamp the website row was added to Mysql, it is often required to change the time in the past
- when visit generator was called for ex.
- when we import past logs (eg. apache logs) in piwik for days/weeks in the past
we should add a parameter to Website create/update API functions to allow setting this date in the past