I scratched a few itches and here's the result - hope you like it

[twogee]

• added Java generics;
• simplified dependencies in Ant builds (tree instead of net);
• added Ivy dependency management;
• added separate packaging for Ant task (without commons-cli);
• updated to commons-cli 1.2 and JUnit4;
• changed attributes and CLI parameters to be consistent internally and
  with Ant guidelines;
• added regex support and property setting to Ant task;
• output builder reverts to stdout instead of crashing;
• output attribute no longer mandatory for Ant task;
• simplified HTML formatting (why does everybody love ?);
• added missing javadoc;