rc1 of update fixtures, includes misc fixes

### Change Log

Update-Fixtures is to address issue #19 but includes other issues.

* Support for fixture updates by adding `update` as a flag in fixture callback and adding logic in `BaseFixtureLoader.js` to handle the operation.
  * Change required a fix for model loading dependency issue (#21).  `MongooseFixture.js` on init now loads all schemas/models in the mongoose-config schema path.
  * An example of update now exists in `test/fixtures/ProductUpdateMock.js` will update the examples on documentation site.
* Cleanup in Tests Commands
  * Fixed `mongoose.connection` to use `open` event listner
  * With adjusted mongoose connection the tests and cleanup needed wrapped into closure
  * Added test for update fixture
  * Adjustments to schema boilerplate generator, name is now placed into schema and `--suffix` flag to append file suffix names
  * some typo fixes