Issue #2805657 by hussainweb: Layout generator does not work properly when site is in a sub-directory

Converting all functions in omega-functions--admin.php to static functions in OmegaLayout or OmegaStyle classes.

Converting all functions in omega-functions.php to static functions in OmegaLayout or OmegaStyle classes.

Adding additional method placeholders that should cover all the functionality from omega-functions.php and omega-functions--admin.php.

Adding Gruntfile support to subtheme builder, additional cleanup and documentation around libraries & js.

Export feature cleanup and a bit of refactoring. Adding ability to select from several locations to save generated themes to.

Adding views support in layout configuration. You can now select a custom omega layout for any views page display.

Adding a 'force compile' feature that will regenerate layout css even if the configuration for layout and layout.generated are the same. Update scss for all default layouts.

Massive cleanup in omega-functions--admin.php. This commit cleans up the method used to generate proper line spacing, indentation, etc. in the generated layout scss files. Also was an attempt to use leafo/scssphp instead of richthegeek/phpsass. Initial implementation of scssphp failed, and fails to compile the grid the same as compass or phpsass does. Added better config options so layout scss files don't need the contents of vars and omegags dumped at the top.

Massive cleanup to _omega_compile_layout_sass() to generate SCSS that passes scss_lint and removes all but merge selector warnings.