Added express middleware support

[srquinn21]

• Added express middleware support.
• Normalized the default global variable exported from the package for consistency. Some docs read "Foo" some read "App" and the code defined it as "foo".

Default implementation should look like:

var express = require('express');
var glue = require('gluejs').middleware;

var app = express();

app.use(express.logger('dev'));

app.use('/js/app.js', glue({
  include: './public/js'
}));
app.use(express.static(__dirname + '/public'));

app.listen(3000);

Notice that include option is the only required parameter. The basepath will default to the include path and the main file will default to index.js in the include path. All other options can be defined in the hash as well.

Let me know if you have any questions/comments/improvements.

[srquinn21]

I've made some improvements... Will resubmit shortly;