implment #8.

define the complexity method in transactional function model
to determine the complexity of itself.
and write its tests.
implement #9.

define the Ei model as subclass of transactional function.
implement #9.

define the Eo model as subclass of transactional function.
implement #9.

define the Eq model as subclass of transactional function.
implement #9.

the software model associates to eis, eos, eqs.
implement #9.

the top action find the all of sotwares includes ilfs, elfs, eis, eos, and eqs.
implement #9.

write the spec of the top action.