add new tests for new limited reaction
fix grouped nodes and backbone tests for intermed migr down half specie formation reaction
broken algorithm tests for intermediate migration down half specie formation reation
add #groups method to RichArray
fix extending of reaction backbone graph
fix phantom error by unification of all species that uses in reactions
add role atoms for which the role will be checked when neighbour atoms gets
add extending of reaction backbone ordered graph when additional nodes presented
fix rspec tests of limited reactions
add tests for code generation of intermediate migration down specie formation reaction
add same unsymmetric parent species code generation case
merge university fixes
fix recursive extending reaction backbone graph