Tox environment for profiling

Run profiling manually:

from cocomico import cwl
from click.testing import CliRunner
runner = CliRunner()

invocation = ["specification",
    "--seeds-file","tests/data_test/seeds.sbml",
    "--sbml-dir","tests/data_test/sbml",
    "--spec","tests/data_test/communities.json",
    "--output","."]

import cProfile
cProfile.run('runner.invoke(cwl.entrypoint,invocation)')