a Travis build for node-webkit 0.10.0-RC1 (based on Node.js v0.11.13)

[Mithgol]

A newer node-webkit's version (v0.10.0-rc1) is based on Node.js v0.11.13; a support for the latter was introduced by #184.

This pull request adds a Travis CI build for that node-webkit's version.

It made necessary to (additionally) preinstall a couple of i386 packages (because of Chromium differences introduced in this new node-webkit's version, I presume).

Several changes in node-pre-gyp were necessary as well. (The corresponding pull requests are mapbox/node-pre-gyp#92 and mapbox/node-pre-gyp#93.)

[Mithgol]

@springmeyer

• Please erase my experimental branch nw-unstable from this repository.
• You may want to bring some (or all) of these changes to your travis-refactor branch as well.

[springmeyer]

thanks, done in ec903c2

[dimsuz]

@springmeyer notice, that although node-sqlite3 v2.2.4 has just been released, I was not able to build it for node-webkit v0.10.0-rc1, here's why:
nw_crosswalk.json from node-pre-gyp got updated by @Mithgol to support nw-v0.10.0-rc1, but those changes got only into node-pre-gyp v0.5.19, while freshly released node-sqlite3 v2.2.4 depends on node-pre-gyp v0.5.18.
After locally changing package.json to depend on node-pre-gyp v0.5.19 compilation went just fine!
Decided to inform you, just in case.

I hope you were not lost in all those version numbers above :)

[Mithgol]

@dimsuz That's because the aforementioned commit ec903c2 actually happened later than version 2.2.4 was “released”.

(Version 2.2.4 was introduced ≈20 hours earlier in the commit cb83565 which was called v0.2.4 by mistake and thus you might have missed it. By now that commit is almost exactly 2 days old already.)

In some sense even this version (2.2.4) is not “released” yet (for example, the latest npm package is still 2.2.3).

tl;dr   Version 2.2.4 and the master branch do not support node-webkit v0.10.0-rc1 yet, but the support is ready to be introduced in the next release.

[dimsuz]

Ah, right! understood then. Main thing is that it is about to start working with nw, I already successfully require-ing it from my pet project. Thank you all! :)