Netsight.windowsauthplugin

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- Allow PAS plugin loading to continue in debug mode (development) with an error warning if the kerberos library cannot be loaded on unix.
[fredvd]

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- Fixed issue with 'came_from' redirects not working correctly

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- Mixed-auth helper now redirects to 'logged_in' to continue standard plone login process [mattss]

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- Added missing __init__.py for mixed-auth profile [giacomos]

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- Add default configuration profile for mixed authentication environments
[datakurre]

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- This is a major change
- All LDAP code has been removed. If you want to use LDAP to look up
user details then use a separate LDAP PAS plugin
- The kerberos python library is now only installed if you add [unix]
option with the egg
- We now decode the username to Unicode before returning it