Fixes a bug in the template file copying mechanism. The previous code failed to honour sub-directorys and flattened the whole tree whilst copying files.
I have fixed this so that sub-directories that are not the meta directory will get copied verbatim into the new project directory.

Kicad manager: first use of wxFileSystemWatcher (only with wxWidgets >= 2.9.2) to monitor files list.

Kicad manager: project_template.cpp: accepts  lower and upper case HTML keywords (compatibility with libreoffice)