added Admin Module
Deleted Category model
Admin Module: CRUD for Tag
Revert "Admin Module: CRUD for Tag"

This reverts commit 93791a5d10e2d5f957ccbcdd5ff94ff036152efb.
Admin Module: CRUD for Tag (reverse-merged from commit 93791a5d10e2d5f957ccbcdd5ff94ff036152efb)
modified layouts in admin module
changes in module
LogIn modified
changed accessRules in TagController  (admin module)