Update JRuby 1.7.x
Added JRuby 22.214.171.124
Add options to keep the build directory around
* Remove -dev build, since it no longer exists on ci.jruby.org * Add 1.7.0.preview1
…SION under that path.
…n of the BUILD_PATH instead of a seeded directory under TMP
use `wget` if it's available and curl isn't