Support Joyent default node box

[kumavis]

Free tier Joyent node box doesn't have enough memory to compile so I found myself here. However, seems SunOS is not popular enough to have a prebuilt binary : P
Just posting my findings

[root@fa5bd1e6-9443-4cd5-b1f1-889c38bebe80 ~/vapor-db]# uname -a
SunOS fa5bd1e6-9443-4cd5-b1f1-889c38bebe80 5.11 joyent_20150219T091122Z i86pc i386 i86pc Solaris

[root@fa5bd1e6-9443-4cd5-b1f1-889c38bebe80 ~/vapor-db]# npm i
npm WARN package.json vapor-db@1.0.0 No description
npm WARN package.json vapor-db@1.0.0 No repository field.
npm WARN package.json vapor-db@1.0.0 No README data
-
> leveldown@1.0.7 install /root/vapor-db/node_modules/level/node_modules/leveldown
> node-gyp rebuild

[root@fa5bd1e6-9443-4cd5-b1f1-889c38bebe80 ~/vapor-db]# npm start

> vapor-db@1.0.0 start /root/vapor-db
> node index.js

module.js:338
    throw err;
          ^
Error: Cannot find module '/root/vapor-db/node_modules/level-prebuilt/node_modules/leveldown-prebuilt/build-pre-gyp/leveldown.node'
    at Function.Module._resolveFilename (module.js:336:15)
    at Function.Module._load (module.js:278:25)
    at Module.require (module.js:365:17)
    at require (module.js:384:17)
    at Object.<anonymous> (/root/vapor-db/node_modules/level-prebuilt/node_modules/leveldown-prebuilt/prebuilt.js:5:18)
    at Module._compile (module.js:460:26)
    at Object.Module._extensions..js (module.js:478:10)
    at Module.load (module.js:355:32)
    at Function.Module._load (module.js:310:12)
    at Module.require (module.js:365:17)

npm ERR! SunOS 5.11
npm ERR! argv "/opt/local/bin/node" "/opt/local/bin/npm" "start"
npm ERR! node v0.12.0
npm ERR! npm  v2.5.1
npm ERR! code ELIFECYCLE
npm ERR! vapor-db@1.0.0 start: `node index.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the vapor-db@1.0.0 start script 'node index.js'.
npm ERR! This is most likely a problem with the vapor-db package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     node index.js
npm ERR! You can get their info via:
npm ERR!     npm owner ls vapor-db
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /root/vapor-db/npm-debug.log