Update plugin data call

Get plugin data from WordPress instead of hard-coding it in the plugin.
Currently used to get plugin version number.
Updated post display name & bio calls

Updated call to get post author display name and bio. Rather than
hard-coding the array identifier, the script loops through the array.
This prepares the plugin for future implementation of multiple authors.
Removed redundant element

Removed element that is already defined by WordPress.
Corrected 'else' conditional for plugin data

Created more graceful fallback for plugin data environment.
Updated WYSIWYG rows

Changed the number of rows for the WYSIWYG editor from 10 to 5.
Removed line break

Removed unnecessary line break for better readability.
Added section for plugin admin initialization

Added section for general admin initialization processes for the
plugin. Initial commit includes call for plugin data, which is
currently used to grab the plugin version in other functions.
Renamed JavaScript file

Renamed ‘edit-user-bio-editor.js’ to ‘edit-user.js’
Removed plugin environment data section

Removed plugin environment data section, and relocated certain portions
of the code to main admin file.
Renamed file

Renamed JavaScript file from ‘edit-user-bio-editor.js’ to ‘edit-user.js’
New Class file

Created new Class file for managing multiple post authors inside
WordPress admin.
Renamed file

Renamed file from ‘edit-user-bio-editor.js’ to ‘edit-user.js’
Added option for multiple authors

Added an option to enable or disable support for multiple post authors.
Changed input ID

Changed input ID to match input name.
Initial code

Initial code for class. Non-working as of this commit.
Update nickname in addition to display name

When saving post author data to the user profile, update the nickname
with the same value as the display name.
Don't use post author info on Author archive pages

If browsing an Author archive page, don’t use post author data.
Added option for multiple authors

Added option for multiple authors, and enable by default.
Adjusted spacing

Adjusted spacing for better readability.
Include class for multiple authors admin

If the plugin option is enabled, include the class for admin of
multiple authors.