Touch Adjustment#adjustable, and fix some rspec deprecations.
Fix the damn taxes.  When tax adjustments are destroyed we need to set additional_tax_total & included_tax_total on items back to 0.

Fixes #5392
Small performance improvement calculating taxes.
fix regexp for credit card, also set month only if regexp is correct

Closes #5427
correct for value to match input id

Closes #5424
Closes #5422
Add circle CI setup