message: Remove driver on start of quickstart
  The quick start fails because it tried to load the drive.
  But the driver is not able to be loaded because there is
  no CMakeLists.txt.
  This replaces the driver by a CMakeLists.txt file check.
diff: @@ -787,13 +787,14 @@ export class CMakeTools implements vscode.Disposable, api.CMakeToolsAPI {
  * Implementation of `cmake.quickStart`
  */
  public async quickStart(): Promise<Number> {
  - const drv = await this.getCMakeDriverInstance();
  - if (!drv) {
  - vscode.window.showErrorMessage('CMake driver is not yet ready.');
  - return -2;
  + let sourceDir = vscode.workspace.rootPath!;
  + if( vscode.workspace.workspaceFolders !== null) {
  + sourceDir = vscode.workspace.workspaceFolders![0].uri.fsPath;
  }
  - if (await fs.exists(drv.mainListFile)) {
  + const mainListFile = path.join(sourceDir, 'CMakeLists.txt');
  +
  + if (await fs.exists(mainListFile)) {
  vscode.window.showErrorMessage('This workspace already contains a CMakeLists.txt!');
  return -1;
  }
  @@ -838,11 +839,9 @@ export class CMakeTools implements vscode.Disposable, api.CMakeToolsAPI {
  '',
  ].join('\n');
  - const source_dir = await this.sourceDir;
  -
  if (type === 'Library') {
  - if (!(await fs.exists(path.join(source_dir, project_name + '.cpp')))) {
  - await fs.writeFile(path.join(source_dir, project_name + '.cpp'), [
  + if (!(await fs.exists(path.join(sourceDir, project_name + '.cpp')))) {
  + await fs.writeFile(path.join(sourceDir, project_name + '.cpp'), [
  '#include <iostream>',
  '',
  'void say_hello(){',
  @@ -852,8 +851,8 @@ export class CMakeTools implements vscode.Disposable, api.CMakeToolsAPI {
  ].join('\n'));
  }
  } else {
  - if (!(await fs.exists(path.join(source_dir, 'main.cpp')))) {
  - await fs.writeFile(path.join(source_dir, 'main.cpp'), [
  + if (!(await fs.exists(path.join(sourceDir, 'main.cpp')))) {
  + await fs.writeFile(path.join(sourceDir, 'main.cpp'), [
  '#include <iostream>',
  '',
  'int main(int, char**) {',
  @@ -863,9 +862,8 @@ export class CMakeTools implements vscode.Disposable, api.CMakeToolsAPI {
  ].join('\n'));
  }
  }
  - const main_list_file = await this.mainListFile;
  - await fs.writeFile(main_list_file, init);
  - const doc = await vscode.workspace.openTextDocument(main_list_file);
  + await fs.writeFile(mainListFile, init);
  + const doc = await vscode.workspace.openTextDocument(mainListFile);
  await vscode.window.showTextDocument(doc);
  return this.configure();
  }
  