test for dynamic definition of iface (#22)
fix test
Revert "fixed the comment for intfs, @@intfs_hash"

This reverts commit e4d5eba9e82b1105bad5ff0e4408e426a497f6dd.
Revert "Unbundle files from activesupport"; fixes #22

This reverts commit 65615521832c557f0f337003674ba1d45009dea7.
updated activesupport extensions to a current version

https://github.com/rails/rails/tree/5aa869861c192daceafe3a3ee50eb93f5a2b7bd2/activesupport/lib/active_support/core_ext

it requires ruby 1.9, and adds options to class_attr
I don't care about these but they don't hurt
Require ruby 1.9.3, stopped supporting 1.8.7.

- the trigger was activesupport
- 1.8.7 gets security updates only since July 2013
- travis builds were failing anyway
travis: +2.1.0, current rbx