Add node package information

Adding "name" and "version" prevents the following error with old node version:

```
$ ./buildout/bin/buildout
Updating template.
Installing node-modules.
npm ERR! Couldn't read dependencies.
npm ERR! Error: No 'name' field found in package.json
npm ERR!     at
/home/elemoine/local/lib/node_modules/npm/lib/utils/read-json.js:220:13
npm ERR!     at
/home/elemoine/local/lib/node_modules/npm/lib/utils/read-json.js:134:32
npm ERR!     at P
(/home/elemoine/local/lib/node_modules/npm/lib/utils/read-json.js:110:40)
npm ERR!     at cb
(/home/elemoine/local/lib/node_modules/npm/node_modules/graceful-fs/graceful-fs.js:36:9)
npm ERR!     at [object Object].<anonymous> (fs.js:107:5)
npm ERR!     at [object Object].emit (events.js:61:17)
npm ERR!     at afterRead (fs.js:878:12)
npm ERR!     at wrapper (fs.js:245:17)
npm ERR! Report this *entire* log at:
npm ERR!     <http://github.com/isaacs/npm/issues>
npm ERR! or email it to:
npm ERR!     <npm-@googlegroups.com>
npm ERR!
npm ERR! System Linux 2.6.35-24-virtual
npm ERR! command "node" "/home/elemoine/local/bin/npm" "install"
npm ERR! cwd /home/elemoine/mf-geoadmin3
npm ERR! node -v v0.4.12
npm ERR! npm -v 1.0.103
npm ERR!
npm ERR! Additional logging details can be found in:
npm ERR!     /home/elemoine/mf-geoadmin3/npm-debug.log
npm not ok
While:
  Installing node-modules.
```

@gjn, please merge if you agree with this change. Thanks.