updated env to find nuc data in more places
added interleaves to all agents
runs through make once before make installing or make testing
adds inventory variable support. closes #784
adds derived variable support
inventories set capacities correctly
known_primitives -> supported_types
pep8 comments
derivation -> init_derived
switched to explicit python2 until regexp issues are worked out
Merge remote-tracking branch 'upstream/pp' into pp
Merge pull request #780 from scopatz/ndbath

updated env to find nuc data in more places
arc upper bounds now set to min(unode max_qty, solver inf) for prog solvers
qty->col_ub
we compile and pass tests with the new converter interface, need to clean up, need to think about constraint-request/bid-unode/vnode-arc interaction
some cleaning up
line lengths < 80
line lengths < 80 for tests
test_helpers -> rsrc_helpers
all plumbing is in place for non-uniform qty adding