created grid filter.
#308 Added lot of audio / video / image / office / archive formats
#216: autocomplete for tags added to page properties.
#216: tag autocomplete updated to be as knockout additional binding.
#465 Site Settings -> Categories: Implemented Paging
#465 Merge branch 'dev' of github.com:devbridge/BetterCMS into dev

Conflicts:
	Modules/BetterCms.Module.Root/BetterCms.Module.Root.csproj
#465 By default, default paging isn't added to grids
Pages, Tags, Redirects, Templates, Widgets: added paging
#465 Implemented paging in site setting grids: blogs, templates, widgets
#465 Implemented paging for knockout grid and used in authors and newsletters grids
#475: implementing page filtering (by category).
Merge branch 'dev' of github.com:devbridge/BetterCMS into dev
#465 Implemented paging in site setting users grid
#475: tag search updated to support ids.
Merge branch 'dev' of github.com:devbridge/BetterCMS into dev
#465 Media manager: implemented paging
#475: page filtering updated.
#465 Migration method moved from media manager API to private migration class
#475: filtering updated.
Merge branch 'dev' of github.com:devbridge/BetterCMS into dev