Only Ruby 2.1 is supported from now on
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Specify Ruby version 2.1.2
Take out unneeded begin/rescue block
Extract #two_sided_time_range method
Change name of #two_sided_time_range, collapse #one_sided_time_range into #string_conditions
Change name of #two_sided_time_range, collapse #one_sided_time_range into #string_conditions
Update gems
Fix some things, break some other fucking things