CeylonAntTask: make sure we let BuildExceptions through
Fix for #1708: compiler in ant throws on non-existing module

Make sure we handle the exception properly (yay class loader issues:
we have three classes doing the same thing)
LauncherUtil: only use the ceylon command from the PATH for CEYLON_HOME if the version match

No use using a 1.0 distrib when running on 1.1
AntBasedTest: detect ant home if we can
Cleanup of old command names in ant tests
Ant Tests: set ceylon.home or we're not testing what we want
Added test for #1708: ceylon-compile ant task prints stack trace for missing module
Make sure an ant test works by sleeping a bit
cosmetic: removed dead code