Modified models for agent type and agent association with agent association type.  Everything needed for data conversion is still there, to be removed later.
Added context agent to entities that have a project foreign key.
Fixing up former project methods on agent - not tested.
make EventSavingTest work after big model changes
Projects page retro-fitted for project as agent.  Also Contributions and Work in Process reports working.
Merge branch 'agent' of https://github.com/valnet/valuenetwork.git into agent
change project in value equation to context_agent
Merge branch 'agent' of github.com:valnet/valuenetwork into agent
fix bug in value_equation view
working on adding context_agents to process commitments and events
Exchange: started with agent work.  Added methods to EconomicAgent for getting subsets of agents and agent associations.
Merge branch 'agent' of https://github.com/valnet/valuenetwork.git into agent
Merge branch 'agent' of github.com:valnet/valuenetwork into agent
add context_agent to all process_logging commitments and events
add exchange_firm methods to EconomicAgent
add all_suppliers method to EconomicAgent
Started work on agent page.  Renumbered migrations from 10 on.  (Noting that migrations 11, 13, 15 are missing from the git scan.  Added in bash before running this.)
Merge branch 'agent' of https://github.com/valnet/valuenetwork.git into agent

Conflicts:
	valuenetwork/valueaccounting/views.py
Merge branch 'master' of https://github.com/valnet/valuenetwork.git into agent

Conflicts:
	valuenetwork/valueaccounting/models.py
	valuenetwork/valueaccounting/tests/test_event_saving.py
Delete wrong migrations.  Fix big from last merge conflict resolution.