Refreshed last release with Code Improvements and Auto-Fixes

Bugs are fixed. And a new shorthand feature included helping with the Polymorphic relation.

Fixed Redirect Path Issue.

Payment Verify Functionality is added.

Docs will be changed later.

But Fixed for Migration. Added nullable to some optional fields.

Some bugs are fixed.
Payment Return and Get Status are coming soon.

Laravel version 5.2 dependency fix.

Refreshed Release. Starting from scratch.