Revert "removed formal support for Node v0.10."

This reverts commit 2d2758e.

.travis.yml

@@ -1,6 +1,7 @@
 sudo: false
 language: node_js
 node_js:
+  - "0.10"
   - "0.12"
   - "io.js"
   - "4"

README.md

@@ -11,6 +11,11 @@ Node.js: fs-extra
 
 <a href="https://github.com/feross/standard"><img src="https://cdn.rawgit.com/feross/standard/master/sticker.svg" alt="Standard JavaScript" width="100"></a>
 
+**NOTE ~~(2016-01-13)~~(2016-04-16):** Node v0.10 (and possibly v0.12) will be unsupported AFTER Ubuntu LTS releases their next version ~~AND [Amazon Lambda
+upgrades](http://docs.aws.amazon.com/lambda/latest/dg/current-supported-versions.html) its Node.js runtime from v0.10~~ (see: https://aws.amazon.com/blogs/compute/node-js-4-3-2-runtime-now-available-on-lambda/).
+I anticipate this will happen around late spring / summer 2016. Please prepare accordingly. After this, we'll make a strong push
+for a 1.0.0 release.
+
 
 Why?
 ----

appveyor.yml

@@ -2,6 +2,7 @@
 environment:
   matrix:
     # node.js
+    - nodejs_version: "0.10"
     - nodejs_version: "0.12"
     - nodejs_version: "4"
     - nodejs_version: "5"