astyle 2.05
new astyle on windows as well
only format source files for certain extensions
new astyle formatting
minor shellcheck.net improvement
upgrade Astyle to 2.05

Fetched from http://astyle.sourceforge.net/

* upgrade-astyle:
  minor shellcheck.net improvement
  new astyle formatting
  only format source files for certain extensions
  new astyle on windows as well
  astyle 2.05