Re-enable iojs/node 0.12 in build script, remove message from readme

.travis.yml

@@ -1,12 +1,8 @@
 language: node_js
 node_js:
-  - "0.10"
-  - "0.12"
   - "io.js"
-matrix:
-  allow_failures:
-    - node_js: "0.12"
-    - node_js: "io.js"
+  - "0.12"
+  - "0.10"
 after_script: ./node_modules/.bin/istanbul cover ./node_modules/tape/bin/tape tests/test-*.js --report lcovonly && cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js --verbose
 webhooks:
   urls: https://webhooks.gitter.im/e/237280ed4796c19cc626

README.md

@@ -5,14 +5,6 @@
 [![Coverage](https://img.shields.io/coveralls/request/request.svg?style=flat)](https://coveralls.io/r/request/request)
 [![Gitter](https://img.shields.io/badge/gitter-join_chat-blue.svg?style=flat)](https://gitter.im/request/request?utm_source=badge)
 
-## !!! Does not work with Node v0.12.x !!!
-
-We're working on this.  Want to help?  See the
-[contribution guidelines](https://github.com/request/request/blob/master/CONTRIBUTING.md),
-help us fix the
-[failing tests](https://travis-ci.org/request/request/jobs/49916823),
-and [submit a PR](https://github.com/request/request/pulls)!
-
 ## Super simple to use
 
 Request is designed to be the simplest way possible to make http calls. It supports HTTPS and follows redirects by default.