Added sfdx project to repo

.forceignore

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+# List files or directories below to ignore them when running force:source:push, force:source:pull, and force:source:status
+# More information: https://developer.salesforce.com/docs/atlas.en-us.sfdx_dev.meta/sfdx_dev/sfdx_dev_exclude_source.htm
+#
+
+package.xml

.gitignore

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+.DS_Store
+.sfdx
+.project
+.salesforce
+.settings
+node_modules
+.idea

config/project-scratch-def.json

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+{
+    "orgName": "wade.wegner Company",
+    "edition": "Developer",
+    "orgPreferences" : {
+        "enabled": ["S1DesktopEnabled"]
+    }
+}

force-app/main/default/classes/DemoController.cls

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+public with sharing class DemoController {
+    /**
+     * An empty constructor for the testing
+     */
+    public DemoController() {}
+
+    /**
+     * Get the version of the SFDX demo app
+     */
+    public String getAppVersion() {
+        return '1.0.0';
+    }
+}

force-app/main/default/classes/DemoController.cls-meta.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<ApexClass xmlns="http://soap.sforce.com/2006/04/metadata">
+    <apiVersion>38.0</apiVersion>
+    <status>Active</status>
+</ApexClass>

force-app/test/default/classes/DemoControllerTests.cls

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+
+@isTest
+private class DemoControllerTests {
+    @isTest static void testGetAppVersion() {
+        DemoController demo = new DemoController();
+        System.assertEquals(demo.getAppVersion(), '1.0.0');
+    }
+}

force-app/test/default/classes/DemoControllerTests.cls-meta.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<ApexClass xmlns="http://soap.sforce.com/2006/04/metadata">
+    <apiVersion>38.0</apiVersion>
+    <status>Active</status>
+</ApexClass>

sfdx-project.json

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+{
+  "packageDirectories": [
+    {
+      "path": "force-app",
+      "default": true
+    }
+  ],
+  "namespace": "",
+  "sfdcLoginUrl": "https://login.salesforce.com",
+  "sourceApiVersion": "41.0"
+}