Remove unneeded files from packaged builds (#642)

* Remove unused files from packaged builds

* Update package.json postinstall steps

* More npm install fixes

* Colorizer test fix

* Clean-up typescript module

* Fix yarn build on macOS

* Add gulp to dev dependencies

* Fix macOS build

extensions/mssql/package.json

@@ -15,7 +15,6 @@
   ],
   "scripts": {
     "compile": "gulp compile-extension:mssql-client",
-    "postinstall": "node ./node_modules/vscode/bin/install",
     "update-grammar": "node ../../build/npm/update-grammar.js Microsoft/vscode-mssql syntaxes/SQL.plist ./syntaxes/sql.tmLanguage.json"
   },
   "contributes": {

extensions/package.json

@@ -6,6 +6,8 @@
     "typescript": "2.6.2",
     "extensions-modules": "file:../extensions-modules"
   },
+  "devDependencies": {
+  },
   "scripts": {
     "postinstall": "node ./postinstall"
   }

extensions/vscode-colorize-tests/package.json

@@ -9,7 +9,7 @@
 	},
 	"scripts": {
 		"vscode:prepublish": "node ../../node_modules/gulp/bin/gulp.js --gulpfile ../../build/gulpfile.extensions.js compile-extension:vscode-colorize-tests ./tsconfig.json",
-		"postinstall": "node ./node_modules/vscode/bin/install"
+		"prepare": "node ./node_modules/vscode/bin/install"
 	},
 	"devDependencies": {
 		"@types/node": "7.0.43",