Remove reCAPTCHA
log api auth failures
Fixed refresh available balance after submit order issue.
Merge pull request #118 from peatio/remove-recaptcha

Remove reCAPTCHA
Change 'Done Orders' to 'Complted Orders'
Adjust global status refresh interval to 3 seconds
add some api examples
add python api client to README
Fixed #199, replace noreply@peatio.com with ENV['SYSTEM_MAIL_FROM']
require two factor auth on withdraw
Merge branch 'master' into api-optimization