Make 1.7 run green by pending out this regression (made GH #1488 to track it)
Passed on my machine but not on travis...adding to same issue as other regression
Update to latest Java 8
Added stat method to FileResource and refactored RubyFileStat to make use of it.

This way RubyFileStat doesn't need to do any more custom logic for jars.
Harden against null path names.
Rewrite Ruby parts of Java exceptions raised from JI calls.

This flag was added for #1313 but not turned on. Due to continued
reports from people having trouble interpreting JI stack traces,
we have decided to do this transformation by default.

Specifying -Xrewrite.java.trace=false or
-Djruby.rewrite.java.trace=false will return to the old non-
rewriting behvaior.

See #1504 and #1313 at least. Fixes #1504.
Hmm merge instead of rebase
Merge with jruby-1_7