fix contributor documentation around previewing with dummy data
Merge pull request #58 from afeld/contrib-fix

fix contributor documentation around previewing with dummy data
Don't delimit the decimal portions of numbers with commas.
Don't display small numbers as 0.
Merge pull request #62 from ilyakava/comma-delim

@afeld => Don't delimit numbers less than 1 with commas
use byebug instead of debugger
move development dependencies into gemfile
only use byebug on MRI 2.x
update gems

switch to rspec 3 syntax using transpec gem
Merge pull request #65 from afeld/byebug

use byebug instead of debugger
Merge remote-tracking branch 'origin/master' into update-gems

Conflicts:
	tricle.gemspec
more gem updates
specify rspec command to be run through guard
Merge pull request #66 from afeld/update-gems

update gems
Display unchanged values as "No change"
refactor aggregation methods into mixin

allows them to be overrriden easier
add note about to readme about aggregation methods
Merge pull request #68 from afeld/no-change

Display unchanged values as "No change"
require ActiveSupport::Concern from Aggregation mixin
Merge pull request #69 from afeld/aggregate

refactor Metric presenter into a mixin on the Metric