[Truffle] - A Symbol literal is the same object when created from identical strings
[Truffle] - Fixing indentation in RubySymbol class.
[IR] More IntelliJ-based cleanup.
[Truffle] - Refactoring RubySymbol.SymbolTable to use ConcurrentHashMap instead of an array.
Merge pull request #1464 from lucasallan/symbols-table

[Truffle] - A Symbol literal is the same object when created from identical strings
[Truffle] Put allocation of the standard hash map store on slow path - it seems to fail under compilation, not sure why.
Fix the JarDirectory resource to return proper sub-files.

This also includes "phantom" jar directory entries, even if a zipfile directory entry does not exist.
Now that regular file globbing handles jar entries well, no need for special parsing logic