42 Despite all this, there's probably enough decipherable material

    42 Despite all this, there's probably enough decipherable material

    43 here to interest the motivated reader.

    43 here to interest the motivated reader.

    44 On the other hand, if you are only going to read this paper once,

    44 On the other hand, if you are only going to read this paper once,

    45 {\bf then don't read this version,} as a more complete version will be available in a couple of months.

    45 {\bf then don't read this version,} as a more complete version will be available in a couple of months.

    46 

    46 

    47 %\tableofcontents

    48 %\tableofcontents

    48 

    49 

    49 

    50 

    50 

    51 

    51 \input{text/intro}

    52 \input{text/intro}