Merge branch 'develop' into feature/issue-6-create-error-handling-ability-on-recharge
Adding custom API exceptions:
Added handle error code
Added error codes dictionary
added unittests for errors
Merge branch 'feature/issue-6-create-error-handling-ability-on-recharge' into develop
Merge branch 'develop' of github.com:westerncapelabs/gopherairtime into develop