Add support for last svnkit version (1.8.6)
- Required for TLS support (SSLv3 Poodle vulnerability)
- svnkit 1.8.6 used by create-vanilla-SCDB.sh
- svnkit 1.3.x no longer supported

Fixes #28.
Update ant to 1.9.4
Merge pull request #29 from jouvin/svnkit-186

Add support for last svnkit version (1.8.6) to support TLS instead of SSLv3