Match case of package name for bower's search

With the current capitalized name, [bower](http://bower.io) cannot find it when searching.

```bash
$ bower search Pikaday
No results
```

When you search for `pikaday`, you find what you expect:

```bash
$ bower search pikaday
Search results:

    pikaday git://github.com/dbushell/Pikaday
```

But if you save `Pikaday` to your bower.json (`bower install pikaday --save`), it adds "Pikaday" to your dependencies: 

```json
"Pikaday": "~1.1.0"
```

This causes errors later when installing:

```bash
$ bower install
...
bower error Pikaday not found
...
There were errors, here's a summary of them:
- Pikaday not found
```

Changing the package name to `pikaday` should fix this workflow issue