Changed call to `showQuickPick()` to use a `Thenable`, resulting in a progress bar being displayed during retrieval of the list of .gitignore files (resolves #6)
Changed call to `showQuickPick()` to use a `Thenable`, resulting in a progress bar being displayed during retrieval of the list of .gitignore files (resolves #6)

CodeZombieCH/vscode-gitignore,CodeZombieCH/vscode-gitignore