Add #format method to APIs. Allows users to set API request extensions:

```
Post.api.set('http://api.faculty.com').format('json');
```

This method transforms requests to:

```
http://api.faculty.com/posts.json
```

It is not yet currently used to parse mime types other than JSON.
BREAKING CHANGES: 

The default api.set method now changes:

updateURL and deleteURL to be parameterized with the primary key:

```
http://api.faculty.com/posts/:id
```

Previously, this method did not add the primary key as a parameter. This update is in keeping with RESTful conventions.
Update README to reflect new changes to the API methods.
Create v0.7.0 distribution
Add .git/ to .gitignore file
Add console.warning for changed API#set methods
Change console.warning to console.log; it doesn't exist out of the box.
Merge pull request #19 from FacultyCreative/features/json-api-format

Features/json api format