Add route and function isAbaRouting

[drewg2009]

Check if the string is an ABA routing number for US bank account / cheque.

Reference https://www.npmjs.com/package/validator

[mikeaig4real]

Hey @drewg2009 I would like to take this up, are there any heads up I should know concerning this...????

[drewg2009]

Sounds good, I would just reference the npm validator implementation for inspiration

[mikeaig4real]

Hey @drewg2009 , I have finished with the issue and have created a branch, made a push to my own fork of the project, all tests are passing, please if there's anything else apart from creating a PR, could you let me know just this once before I do...??? Thanks.