io.js support

[springmeyer]

io.js 1.0.1 is now out (https://iojs.org/) and node-pre-gyp packaged apps like node-sqlite3 and node-mapnik almost works out of the box. To get things working we'll need:

• Wait until certificate not trusted errors with amazon cert chains nodejs/node#402 is fixed (refs Packages that currently do not work with io.js [List] nodejs/node#456)
• Add a v1.0.2 target (or whatever the release is that fixes certificate not trusted errors with amazon cert chains nodejs/node#402) to the abi_crosswalk.json
• Temporarily ignore the harmless child_process: customFds option is deprecated, use stdio instead in tests (until node-gyp release lands for Use stdio instead of customFds nodejs/node-gyp#533 - refs Tests should work against node v0.11.14 #125)

[rvagg]

v1.0.2 is in and should have that aws fix

[springmeyer]

Thank you @rvagg! Publishing v0.6.2 shortly with the minimal fixes needed for all tests to pass with io.js v1.0.2. NOTE: the only failing tests with node-pre-gyp (other than the aws cert) were related to the obscure/advanced support node-prep-gyp has (like node-gyp) for passing the --target flag. I use this to build and package windows binaries on linux travis machines for mapbox-studio: https://github.com/mapbox/mapbox-studio/blob/f988c5947268efd9c07487fb553e930dbeac437b/scripts/build-atom.sh#L81-L85