login frame :
 - close frame on connection ok
 - center frame
add redirection mode to login (not enabled by default)
remove scrollbar off
Merge branch 'master' of https://github.com/gsaunier/open-miage-sso-client
up to v1.0.6
doc fix for v1.0.6
Merge pull request #8 from gsaunier/master

1.0.6