Replace deprecated Ant <tasks> with <target>
Fix unescaped $, bad tag in scaladoc
Remove dead scaladoc links
Suppress and/or fix unchecked javac warnings
Fix scaladoc invocation warning, and enable javac warnings properly, with plugin config updates
Fix (?) Jackson exclusion, and remove apparently unneeded exclusions, all of which were causing build warnings
Fix one new style error introduced in scaladoc warning commit
Fix misc style issues from PR discussion; move @SuppressWarnings("unchecked") to method scope in tests; revert change to REPL scaladoc