Issue #22 Use timecop of rspec test cases

Add time cop to the gemfile.
Fix datetime before all specs.
Fix datetime before factory create of an event.
Issue #22 Use datetime range for by date search

Lookup events from mongoid using a datetime range of one day instead of
a date for greater accuracy across timezones.

Add the all_day trait to factory girl events.
Issue #22 On date method of block checks date

Check date of each date being compared when determining if they
are on the same date.
Issue #22 Check date in onDate method

When comparing the date of an event to an arbitrary date use the
date method along with diff of days.
Issue #22 Method call styling
Issue #66 Style upvote counter