Synnefo

fix+test for issue_commission release logic

issue_commission() with negative quantity is considered
to be a 'release' instead of an 'allocation'.
The limit checks for the conditions or the release were
somewhat incomplete and inconsistent.

The new logic also fixes the bug found by kpap where...

wip Use decimals to store quota values; infinite quotas no more supported

Add details in exceptions raised in issue_commission

Exceptions regarding limit violations now carry details
as specified in CommissionValueException

Do not record arguments of add_quota.
Add call query_serials separate from ack_serials.

Add a serial in the add_quota API call

Make side-effecting quotaholder API calls fail completely,
if part of the request is rejected.

If such a call returns a non-empty list, this means that
the entire call failed due to the actions mentioned in the list.

Simplify set_quota implementation

fix obscure bug in callpoint class that triggered db integrity errors

Callpoint class had a placeholder attribute original_calls
which was initialized as an empty dictionary,
and thus was usable. Class init() code did not initialize
original_calls as it should but because the placeholder was...

Implement reset_holding API call

Check for pending commissions per entity, resource

Rename set_full_holding to init_holding

Pass Entity instead of string.

Do not create entity in issue_commission.

Add copyright.

Merge quotaholder into synnefo