automatic, command-line conversion

Update friendica-to-smarty-tpl.py to accept a command-line parameter '-p' that allows you to specify the directory to convert on the command line, like

    ./friendica-to-smarty-tpl.py -p /usr/local/www/friendica/view/

Also, add a new script that automatically converts all the template folders under a top-level Friendica installation:

    ./updatetpl.py -p /usr/local/www/friendica/

This allows for a one-shot update of all template files, or even inclusion in a Makefile.

Finally, I added a header to all generated Smarty templates warning that the template was automatically generated and shouldn't be edited