Revert "Move Show Entity view into admin interface."

This reverts commit 76b8c700fc49b250e89c683f6fde54e21460d939.

Conflicts:
	dexter/admin/admin.py
	dexter/templates/admin/show_entity.html
Revert "Move Show Article view into admin interface."

This reverts commit b2fed9e5ae2b78b7a799ffb580bc53082a481f24.

Conflicts:
	dexter/admin/admin.py
Revert "Remove Bootstrap 3."

This reverts commit 6fbaddd7dcc401daa74450ba36f38ceeee6a442d.

Conflicts:
	dexter/templates/admin/custom_master.html
Revert "Move Create Article view into admin interface."

This reverts commit 49e8d04c3f9d75adbd851e0f2ec6ebae6422ab31.

Conflicts:
	dexter/admin/admin.py
	dexter/templates/admin/add_document.html
Revert "Override the default Document Create template & view."

This reverts commit 48026a562cdd5963efccbb272a751765890248c9.
Serve admin index page from /admin in stead of root.
Use separate bundle for serving Admin CSS asset.