Add install generator and support Rails 3 or 4

spec/generators/swagger_rails/install_generator_spec.rb

@@ -0,0 +1,20 @@
+require 'rails_helper'
+require 'generators/swagger_rails/install/install_generator'
+
+describe SwaggerRails::InstallGenerator do
+  include GeneratorSpec::TestCase
+  destination File.expand_path('../tmp', __FILE__)
+
+  before(:all) do
+    prepare_destination
+    run_generator
+  end
+
+  it 'creates a default swagger.json file' do
+    assert_file('config/swagger/v1/swagger.json')
+  end
+
+  it 'creates a swagger_rails initializer' do
+    assert_file('config/initializers/swagger_rails.rb')
+  end
+end

spec/generators/swagger_rails/tmp/config/initializers/swagger_rails.rb

@@ -0,0 +1,6 @@
+SwaggerRails.configure do |c|
+
+  # Specify the API version and hence discovery_url (e.g. swagger/v1/swagger.json)
+  # that will be used to power the embedded swagger-ui
+  c.target_api_version = 'v1'
+end

spec/generators/swagger_rails/tmp/config/swagger/v1/swagger.json

@@ -0,0 +1,54 @@
+{
+    "swagger": "2.0",
+    "info": {
+        "version": "0.0.0",
+        "title": "[Enter a description for your API here]",
+        "description": "The docs below are powered by the default swagger.json that was installed with swagger_rails. You can update it to describe your API. See here for the complete swagger spec - https://github.com/swagger-api/swagger-spec/blob/master/versions/2.0.md"
+    },
+    "paths": {
+        "/a/sample/resource": {
+            "post": {
+                "tags": [
+                  "a/sample/resource"
+                ],
+                "description": "Create a new sample resource",
+                "parameters": [
+                    {
+                        "name": "body",
+                        "in": "body",
+                        "schema": {
+                            "$ref": "#/definitions/CreateSampleResource"
+                        }
+                    }
+                ],
+                "responses": {
+                    "200": {
+                        "description": "Ok"
+                    }
+                }
+            }
+        }
+    },
+    "definitions": {
+        "ClinicPatientLink": {
+            "properties": {
+                "clinic_patient_link": {
+                    "schema": {
+                      "$ref": "#/definitions/ClinicPatientLink"
+                    }
+                }
+            }
+        }
+        "ClinicPatientLink": {
+            "properties": {
+                "name": {
+                    "type": "string"
+                },
+                "date_time": {
+                    "type": "string",
+                    "format": "date-time"
+                }
+            }
+        }
+    }
+}