Test against 2.0.0 and rubinius on travis-ci
Remove test against "ruby-head" in travis-ci

travis' "ruby-head" is not ruby-head, it is too old.
"ruby-head" is ruby2.0.0dev today. This is before 2.0.0-p0
Use rbx instead of rbx-19mode
Remove test against rbx in travis temporary
Uses Location#constant_scope instead
Raises RuntimeException in the right occasion
Merge pull request #25 from badosu/rubinius-fixes

Simple Rubinius fixes
Describe each #frame_type spec
Refactors #frame_type for rbx
Merge pull request #27 from badosu/describe_frame_type

Describe each case of #frame_type
Merge pull request #28 from badosu/refactors_frame_type_for_rbx

Refactors #frame_type for rbx
Specify #frame_type when code is evaluated

Fix #29
Merge pull request #30 from badosu/specify_eval

Specify #frame_type when code is evaluated
Merge pull request #22 from sanemat/feature/travis-update

Update travis-ci config
Check if it is inside an eval block in rbx

Use CompiledCode#for_eval?
Check for Class in rbx
Replaces rbx description "{ } in" to "block in"
Add rbx-19mode in travis
Merge pull request #31 from badosu/frame_type_eval_for_rbx

Check if it is inside an eval block in rbx
Merge pull request #32 from badosu/fix_all_rbx_specs

Fix #frame_describe specs and add rbx to travis