Improve loopback:relation for custom model name

Add an `other` option to model names list, if this option is
selected, prompt user to type a model name.
https://github.com/strongloop/generator-loopback/issues/35

Signed-off-by: Clark Wang <clark.wangs@gmail.com>
Merge tag 'v1.2.2'

1.2.2
Merge pull request #39 from clarkorz/allow-custom-relation-model

Improve loopback:relation for custom model name
example: fix sample-data/import script

The server app calls the import script during the boot process.

This commit fixes `node server/sample-data/import` to not call the
import second time.
example: add geo to sample locations

This speeds up the application startup and prevents timeout errors
when running end-to-end tests on the build server.
Merge pull request #43 from strongloop/feature/add-geo-to-location-sample-data

Add geo to location sample data
Add loopback:swagger generator
Add README as a tutorial
Fix the base model
Merge pull request #42 from strongloop/feature/swagger-codegen

Add loopback:swagger generator
Bump version
Merge branch 'release/1.3.0' into production