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 :)
Merge pull request #457 from newstler/patch-1

Updated Russian Ruble as it has now official symbol.