Cannot resolve symbols

[JeongJun-Lee]

I added this lib to build.gradle of app by your guideline like the attached below:

Now only it recognize uz.paycom.payment.PaymentActivity of all imports which is required to implementation.
Because the lib doesn't expose constants like EXTRA_AMOUNT, EXTRA_LANG and EXTRA_RESULT, there are errors like the attached below:

And also there is no model, utils in the payment lib like the attached below:

[azizkayumov]

@JeongJun-Lee This has been fixed in #5