generator-bat

refactor(app generator): uniformly apply file naming strategy for template files that need to be exempted from their usual meaning

The strategy used is simply to prepend an '@' symbol to the full regular name.
Replaces two competing conventions:
  * Removing the leading '.' symbol for invisible files.
  * Prepending a leading '_' symbol for others.
  * Sometimes, a leading '_' symbol was also used to mark the file as a "real" template.