Added tag auto complete.
Add implemets of views, creating new filecategory.
Added category views.
Add FileStatistics entity.
Merge branch 'Vadzim' of https://github.com/VadzimBura/GroupProject into Vadzim
Merge remote-tracking branch 'remotes/origin/Vika' into Vadzim

Conflicts:
	FileExchange/FileExchange.WebUI/App_Data/FileExchange.mdf
	FileExchange/FileExchange.WebUI/App_Data/FileExchange_log.ldf
	FileExchange/FileExchange.WebUI/Controllers/HomeController.cs
	FileExchange/FileExchange.WebUI/FileExchange.WebUI.csproj
	FileExchange/FileExchange.WebUI/Views/Authorization/SignIn.cshtml
	FileExchange/FileExchange.WebUI/Views/Home/Index.cshtml
	FileExchange/FileExchange.WebUI/Views/Shared/_Layout.cshtml
	FileExchange/FileExchange.v11.suo