Report missing credentials to the Rails application.

If no username or password is provided a MissingCredentialsError is
raised which causes a Rack caught exception and a 500 Error in gitlab.
Omniauth provides a way to raise such errors to the application by
using the 'fail!' method to pass the exception to the registered
failure handler. For gitlab this is the omniauth_controller code.

This is required to resolve gitlab issue #1077.

Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>

the request phase, since the adaptor now is only instantiated on
the callback phase.

Move Adaptor instance initializtion in callback phase

Move Adaptor instance initializtion in callback phase, which can make setup phase work correctly. And also do some indentation fix.

Use :raw_info instead of 'original_ldap_entry'

Remove beta notice

Net::LDAP::Entry always returns an array of values.  

Net::LDAP::Entry (http://net-ldap.rubyforge.org/Net/LDAP/Entry.html) explicitly
returns an array of values for each attribute. The result of OmniAuth::Strategies::LDAP#map_user
was returning a string representation of the attribute values array (ie. "['attribute_value']"),
and it should be returning the actual attribute value.

Remove ruby-debug dependency

Wrapping original LDAP info in a hash so it doesn't break omniauth auth_hash interface

Conflicts:
	omniauth-ldap.gemspec

bump the version to 1.0.0

spec. Added spec test for ldap strategy