update uri stdlib from Rubinius
add String#try_convert, so we can just use urilib from rubinius, and untag new specs
try ruby queue
we run these now
bring in easy stuff from rubinius
Revert "try ruby queue"

This reverts commit 920d4bf85055ebdce021d51676f777bf53f0fb24.
add tags and env-options to run CAPI and FFI specs
bump rubyspecs, run ffi_specs by default
tag remaining failures
add tags for travis failures
Merge pull request #285 from MagLev/tim/ffi_and_capi_specs

Tim/ffi and capi specs