locals can be passed as views opts

[xpepermint]

With this commit locals can be sent like this:

var views = require('../../co-views');
module.exports = views(__dirname+'/../app/views', {
  map: { ... },
  locals: { ... } // this is needed for flexibility
});

This update also solves this proposal: #14
Please accept and merge. Thanks.

[haoxins]

2f57d2c

land in 0.3.0