in order to make "zopectl test" shut up

- configuration through ZCML
- additional useful logging

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in order to make the sniffing a bit configurable for instances
working with encodings other than iso-8859-15 or utf-8

- the ZMI edit view now *always* uses 'utf-8' and no longer uses self.output_encoding (which is only relevant for FTP/WebDAV)
- 'output_encoding' is now a property

/Zope/branches/ajung-zpt-encoding-fixes

This branch fixes several encoding issues with the ZopePageTemplate
implementation, some webdav issues and now uses unicode internally
for ZPT instances (but not for the PageTemplate(File) classes)
                         

from a <meta http-equiv..> tag

necessary for pt_edit() calls where the encoding should not be changed
by sniffing inside the content (used by pt_editAction(), ZMI and by
the constructor)

- moved the encoding detection into pt_edit() to make it available in a single place

as encoding if the encoding could not be determined from the body text