Reimplement the Creation of Trial Request to be compatible with renderjs/jio approach. Use Trial Condition for define what are the trials available to be requested.

On the core of SlapOS for a full autonomous deployment, it is required frontend and re6st normally. Include initial products for make easy the user to deploy it.

By "delete" is done by close Assigments or Invalidating Documents.

Obviously It was a horrible idea :)

On slapos master, the TrackingAPI is only used for determinate location/project to for computers and/or Instances via Internal Packing Lists only.

The goal of this change is not allow others movements "change" location of the item and speed up by simple reducing table size to optimal point.

To execute a slapconsole script, we could only do:

`slapos console < script.py`
but this does not stop in case of error

or
 `echo 'execfile("script.py")' | slapos console`
but this is too complicated.

Extend this API so that we can simply use

`slapos console script.py`

inspired by `python script.py`


/reviewed-on !39

When the workflow history is too big the response time
of getCreationDate is too high.

Use Cache to avoid recalculate it.

This prevents elements be moved arround.

This reverts commit b5a1e352

foo.com really exists and example.com was intended for this kind of
example (even if I'm not sure it's OK to actually connect)

Because this test really make a connection and the purpose is to test
URL generation, use a link local address that will fail immediately
rather than an unreachable address that will timeout.

To execute a slapconsole script, we could only do:
`slapos console < script.py`
but this does not stop in case of error

or
 `echo 'execfile("script.py")' | slapos console`
but this is too complicated.

Extend this API so that we can simply use

`slapos console script.py`

inspired by `python script.py`

This allow us to produce links to third parties pay someones invoices (if they have Manager account).