Navigation improvements and a public to protected changes on files module models
-Fixed incorrect variable in admin.php
-Added parent and children relationship to Link model
-Updated tree_builder lex tag
-Updated some old references to navigation_m
Fixed join syntax to query builder
-Fixed tabs in admin controller
-Updated navigation_m to Link in Page model
-Updated navigation widget to use eloquent models
Updated naming convention
Only show root level links, children should be loaded via eager loading
Reverted clearing cache for navigation links. PSR-2 Updates.
Fixed URL to pull request since comment gets buried.
Updated fluent to eloquent call, fixed issue that wasn't specifying navigation_group_id
Merge pull request #2514 from swilla/2.3/develop

Navigation Module Updates