Logformat annotation fixes

Logformat annotation fixes

Currently note values printed with "%note" formating code, which contain non
alphanumeric characters, were quoted and quotes were then escaped, resulting
in bizarre logged rendition of empty or simple values (often received from
various helpers):
      %22-%22
      %22Default_Google%22
      %22pg13,US%22

This patch:
- does not use quotes to print annotations

- allow system admin to define a separator to use for logged
  annotations. The %note logformat accepts the following argument:
     [name][:separator]
  The separator can be one of the ',' ';' or ':'.
  By default, multiple note values are separated with "," and multiple
  notes are separated with "\r\n". When logging named notes with
  %{name}note, the explicitly configured separator is used between note
  values. When logging all notes with %note, the explicitly configured
  separator is used between individual notes. There is currently no way to
  specify both value and notes separators when logging all notes with %note.

- makes the Format::Token::data a struct (now is a union) and initialize
  Format::Token::data data members in Format::Token::Token constructor.

This is a Measurement Factory project