Entity fix

PRIZMA_Design fix
set default constructors to protected
add NuGet packages

Data - nHibernate, nHibenate fluid
PrizmMainProject - ninject
UnitTests - nUnit, Moq
lesser fix
entity constructors
Revert "add NuGet packages"

This reverts commit ab1d52ff4343eab7a656a2d52a038f789db6c3c4.
add constructors
Change base entity name to Item
Merge pull request #152 from olga-jane/D_Kulish_1

Code for Mill entitys