Fix null reference check logic when unlocking a password.
Merge pull request #594 from nimore/UnlockPasswordFix

Fix null reference check logic when unlocking a password.
Build dinamico demo content
Fixed weird padding on logon menu link
Fixed dropup, some margins and padding when using toolbar on top. At bottom by default
Assembly version 2.6.3.7
Fixed problem saving parts from the form edit page (fixes #571)
Check for invalid chars in uploaded file name - Resolves #579
Merge branch 'master' of github.com:bherila/n2cms

Conflicts:
	src/Mvc/MvcTemplates/N2/Content/Framed.Master
	src/Mvc/MvcTemplates/N2/Resources/Css/edit.css
	src/Mvc/MvcTemplates/N2/Resources/Css/framed.css