Fix distribution resolution
Fix distribution resolution

`platform.linux_distribution()` returns a three-tuple value, e.g.,
('Ubuntu', '14.10', 'utopic')`. The code needed to be updated to
only use the first value of the tuple (e.g., "Ubuntu").

lillian-lemmer/hypatia,lillian-lemmer/hypatia,hypatia-software-org/hypatia-engine,hypatia-software-org/hypatia-engine