Fix Reauth Loop on Login Form; Load L10N Files

Remove reauth argument to avoid destruction of session immediately after login. Add load_plugin_textdomain() call so that language overrides are used.
updated AuthType & Require per https://wiki.shibboleth.net/confluence/display/SHIB2/NativeSPApacheConfig#NativeSPApacheConfig-EnablingtheModuleforAuthentication
updated ShibRequireSession on to ShibRequestSetting requireSession 1
Merge pull request #6 from dericcrago/AuthType

htaccess text: update AuthType & Require per Shibboleth wiki
Merge pull request #5 from jrchamp/master

Fix Reauth Loop on Login Form; Load L10N Files
load multisite options correctly (#8)