Directory endorsed no longer included

See annonce https://shibboleth.net/community/advisories/secadv_20141103.txt
"IdP V2.4.3 is also available and no longer includes the unneeded jars,
does not install a lib/endorsed directory, and includes an internal.xml
file modified as above."
Merge pull request #11 from mremy/change_for_shibboleth_idp_2_4_3

Directory endorsed no longer included