Better PagSeguro errors.
Merge pull request #66 from Shopify/pagseguro_connection_errors

Better GestPay errors
Ignore x_signature instead of deleting it.
Test success? after acknowledge on return.
Merge pull request #69 from Shopify/fix_universal_return

Fix universal signature bug on return.
Update universal_return_test.rb

Fix typo
Discard extra parameters in universal gateway.
Merge pull request #70 from Shopify/universal_params_filtering

Discard extra parameters in universal gateway.
PagSeguro invalid acknowledge notification
Merge pull request #82 from Shopify/pag_seguro_invalid_acknoledge

PagSeguro invalid acknowledge notification
remove commas followed by 3 digits to remove thousand separators in IPay88
tests for gross stripping commas correctly
Merge pull request #84 from Shopify/fix_ipay_thousand_separator

Fix an issue with thousand separators in IPay88
nil guard credentials in options hash
Merge pull request #87 from Shopify/nilguard_coinbase_credentials

nil guard credentials in options hash
update coinbase API URIs
Merge pull request #88 from Shopify/coinbase_api_uri_update

update coinbase API URIs
Moving referrer_id to crypt field instead of the form field
Merge pull request #89 from Shopify/pass-ref-id-in-crypt-field

Moving referrer_id to crypt field instead of the form field
Handle floating point errors in PayU Paisa notifications