Removing unnecessary Submissions files.
Refactoring the Ninja Forms plugin so that it is wrapped in a singleton class instance.
Creating the submissions CPT and class.
Created a deprecated.php file to house older, legacy functions.
Added two new functions for interacting with fields and subs.
Added two new functions for interacting with the database.
Updated the "view submissions" link on the form list.
Removed the old submissions page from the admin menu.
Updated the save submission process to use the new submission CPT and class.
Working on sorting for columns
Fixed a bug that prevented all columns from being visible in forms with more than five fields.
Added the option to give fields an admin label as well as sort them numerically.
Merge branch 'develop' into feature/sub-cpt

Conflicts:
	includes/database.php
Working on new submissions stuff.
Removing unnecessary field registrations.
Added date picker to the list of JS dependencies.
Added CSS to make the edit submissions screen a little more desirable.
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Merge branch 'feature/sub-cpt' of https://github.com/wpninjas/ninja-forms into feature/sub-cpt
Working on submission exporting.