Syntax change for Ruby hashes
Added /concerns to autoloader and updated i18n
config to get rid of deprecation error
Added support for Units to convert to their existing
unit - in case we don't know the initial unit
Tweaked name of sleep ends after start validator, made private, and added a few matchers to sleep spec
Clean up gemfile - organize etc
Reset data_providers_for after each spec - that way
the specs can run for each individual API provider
Added data provider example support to WithingsAccount
Restructured WithingsAccount to match FitbitAccount