Version 2.0.4

Updated dependencies and require Elixir ~> 1.2

Version 2.0.0

Raised version to 2.0.0 because the configuration format and API was changed in backwards incompatible way.

Major changes:

• Configurations are now keyword lists, allowing only specific configuration values to be changed for each environment.
• The loader behaviour load callback received now id of the spreadsheet as parameter
• The parser behaviour doesn't receive version, instead it returns version used in later queries or the version is a hash of the returned data.
• GoogleSheets.latest_key has been renamed to GoogleSheets.latest_version

See the REAME for more instructions.