[Working Capital] New Feature: Exceptional acquisition transactions for
values over current acquisition limit, requiring management board
approval.
Minor Change: added consistency predicate to make invoice files
mandatory.
[Working-Capital] Minor Change: added exceptional acquisitions approvals
to the pending authorization list for management council members.
Minor Change: Created activity for management council members to reject
exceptional acquisitions.
Fixed previous commit.
Fixed bug when selecting processes to show on pending authorization
list.
Merge pull request #21 from diutsu/develop

[Working Capital] New Feature: Exceptional acquisition transactions 

Closes #2