Merge pull request #451 from zacksiri/master

support rails 4.2
Fix symbol_first for CZK
Merge pull request #452 from sigra/master

Fix symbol_first for CZK (Czech Koruna)
Add Money.default_formatting_rules config hash
Merge pull request #453 from mateusg/master

Add `Money.default_formatting_rules` config hash
v6.4.0
Correct spelling of infinite_precision
Merge pull request #458 from lulalala/spelling

Correct spelling of infinite_precision
Updated Russian Ruble as it has now official symbol.

Update currency_iso.json

Update formatting_spec.rb

Update CHANGELOG.md

Update CHANGELOG.md

Update AUTHORS

Added myself and sorted a little :)