downgrade to pylibmc-1.5.2 (#960)
downgrade to pylibmc-1.5.2 (#960)


PersonalGenomesOrg/open-humans,PersonalGenomesOrg/open-humans,OpenHumans/open-humans,OpenHumans/open-humans,OpenHumans/open-humans,PersonalGenomesOrg/open-humans,PersonalGenomesOrg/open-humans,OpenHumans/open-humans