Enable tslint - clean up main.ts

Author: rkeithhill

package-lock.json

@@ -40,12 +40,13 @@
     "vscode-languageclient": "3.3.0"
   },
   "devDependencies": {
+    "@types/mocha": "^2.2.32",
     "@types/node": "^6.0.40",
+    "mocha": "^2.3.3",
+    "tslint": "^5.8.0",
     "typescript": "2.3.x",
     "vsce": "^1.18.0",
-    "vscode": "^1.1.0",
-    "mocha": "^2.3.3",
-    "@types/mocha": "^2.2.32"
+    "vscode": "^1.1.0"
   },
   "extensionDependencies": [
     "vscode.powershell"