When working with SPFilter, SAML2LogOutHandler should retireve user principal from session
Move 'reflection' and 'properties' stuff to common module, so both core and idm modules can reuse it
Removing Base64 class from idm because it's already in common module. Fix imports
Merge pull request #43 from mposolda/master

Some refactoring related to common module and it's usage
Merge pull request #39 from junxiong/master

SAML2LogOutHandler can not work with SPFilter