Refactored maintenance module to use fluent
Fixed function call
Fixed a non static reference

Just something I found while hacking around 2.3.
Merge pull request #2531 from wshatch/patch-2

Fixed a non static reference
Merge remote-tracking branch 'upstream/2.3/develop' into feature/maintenance
DB doesn't exist yet, lets do it the ugly way
Merge pull request #2523 from swilla/feature/maintenance

Eloquent Refactor of Maintenance Module
Moved the Maintenance export logic back into a "Data" model.
Ran PHP CS Fixer with the following:
    php-cs-fixer fix ./installer --fixers=trailing_spaces,unused_use,php_closing_tag,short_tag,return,visibility,braces,phpdoc_params,eof_ending,extra_empty_lines,include,controls_spaces,elseif
This will ignore the requirement for class names to match the filename as for now CodeIgniter has lowercase files for controllers and upper-case class names. We'll do it this way for now as we move as much coder over to being a composer package as possible.
Be less specific with PHP versions for Travis.
Some PSR-0 on users.
Merge branch '2.3/develop' into feature/sentry

Conflicts:
	system/cms/controllers/admin.php
	system/cms/core/API_Controller.php
	system/cms/core/Admin_Controller.php
	system/cms/core/MY_Controller.php
	system/cms/core/WYSIWYG_Controller.php
	system/cms/libraries/Streams/drivers/Streams_cp.php
	system/cms/libraries/Streams/drivers/Streams_fields.php
	system/cms/modules/addons/models/module_m.php
	system/cms/modules/navigation/controllers/admin.php
	system/cms/modules/navigation/src/Pyro/Module/Navigation/Model/Group.php
	system/cms/modules/navigation/src/Pyro/Module/Navigation/Model/Link.php
	system/cms/modules/pages/src/Pyro/Module/Pages/Model/Page.php
	system/cms/modules/streams_core/controllers/ajax.php
	system/cms/modules/streams_core/models/streams_m.php
	system/cms/modules/users/config/ion_auth.php
	system/cms/modules/users/controllers/admin.php
	system/cms/modules/users/controllers/users.php
	system/cms/modules/users/helpers/user_helper.php
	system/cms/modules/users/models/ion_auth_model.php
	system/cms/modules/users/models/user_m.php
	system/cms/plugins/user.php
	system/cms/themes/pyrocms/views/admin/dashboard.php
Sentry integration and comment improvements
Users and profile data is now available via relationships instead of horrendous joinery mess.