Support for FBDev, statically linked library and musl

[piranna]

This pull-request is work in progress, but it works :-) I've open early to discuss about how to integrate it. It has the next features:

• updated dependencies, both npm and libraries. This last ones are only done on their current version branch to prevent incompatibilies on newer ones that would require modify the code.
• allow to use FBDev as backend, so node-canvas can be used to draw on the console. This is done thanks to the work of @ReneHollander at https://github.com/ReneHollander/node-canvas, that also added some basic support for a selectable backend support.
• compile it as a statically linked library without dependencies on any external dynamic library. This is based on the work of @magicode at https://github.com/magicode/node-canvas, although I needed to do some fix-ups due to undefined references.
• musl support as C lib instead of glibc, that since don't support lazy linking is the reason why I need to fix the undefined references.

All of this makes it possible to use node-canvas to draw on the console on NodeOS.

First step will to update the code with current master, and later improve the FbDev support and the alternatives backends, probably making them selectable at compile time.

[JZ-at-TP]

Just tossing this out there, I use node-sdl with node-canvas to run a native app and draw to the screen real-time.

[piranna]

Just tossing this out there, I use node-sdl with node-canvas to run a native app and draw to the screen real-time.

Didn't know of node-sdl, really interesting, thanks! :-D

[chearon]

We now have static builds for npm install canvas@next