Added ant plugin

plugins/ant/ant.plugin.zsh

+_ant_does_target_list_need_generating () {
+  if [ ! -f .ant_targets ]; then return 0;
+  else
+    accurate=$(stat -f%m .ant_targets)
+    changed=$(stat -f%m build.xml)
+    return $(expr $accurate '>=' $changed)
+  fi
+}
+
+_ant () {
+  if [ -f build.xml ]; then
+    if _ant_does_target_list_need_generating; then
+     sed -n '/<target/s/<target.*name="\([^"]*\).*$/\1/p' build.xml > .ant_targets
+    fi
+    compadd `cat .ant_targets`
+  fi
+}
+
+compdef _ant ant