Direct BEL Pipeline injected edges

[wshayes]

Look at BEL1 language document for examples of these statements that are created by the BEL Pipeline (compiler):

deg() -- deg(a()) directlyDecreases a()
tloc() -- a() hasLocation a(X, loc())
complex() -- hasComponent a()
composite() -- hasMember a()
a(X, var()) - hasVariant

hasModification
hasProduct
hasReactant