restructure cli and eplus related functionality to be submodule.
This reduce the over import time and cli start up time since the bulk of import time is from eplus related stuff.
This would introduce slight changes in api when access eplus functionality, i.e., all eplus related api can no longer be
accessed through the frads api but have to access by from frads import eplus
for example
before:
import frads
frads.load_energyplus_model
after
from frads import eplus
eplus.load_energyplus_model
restructure cli and eplus related functionality to be submodule. This reduce the over import time and cli start up time since the bulk of import time is from eplus related stuff. This would introduce slight changes in api when access eplus functionality, i.e., all eplus related api can no longer be accessed through the
frads
api but have to access byfrom frads import eplus
for example before:after