Pc validation fix

* Fix postal code validation regex an error message
* Add more test cases for each validator
* Add gem home page
* Fix typo in the travis badge
* increase gem version
* fix typo in text on test files
* fix phone number regex to accept +1 at the beginning
* change phone number regex to no accept letters
* change email regex to no accept back-ticks this will fix LH ticket number 3436.