logbook>=1.1.0,<2.0.0
mbstrdecoder[all]>=0.6.2,<1.0.0
six>=1.11.0,<2.0.0
tabledata>=0.2.1,<1.0.0
typepy>=0.3.2,<1.0.0

mbstrdecoder[all]>=0.6.2,<1.0.0
six>=1.11.0,<2.0.0
tabledata>=0.2.1,<1.0.0
typepy>=0.3.2,<1.0.0

Change logbook to an optional dependency
Change logbook to an optional dependency
