Added DropDownController, DropDovnVm, and _DropDown partial view.
Merge branch 'SilList_7' into SilList_7_4/5/14

Conflicts:
	SO.SilList.Manager/SO.SilList.Manager.csproj
	SO.SilList.Web/SO.SilList.Web.csproj
Some Views, Actions ... for DropDown.
S
Merge branch 'SilList_7_4/9/14' into SilLisy_7_push

Conflicts:
	SO.SilList.Manager/SO.SilList.Manager.csproj
	SO.SilList.Web/SO.SilList.Web.csproj
Merge pull request #20 from SilverObject/SilLisy_7_push

Sil lisy 7 push