Bug report: MIME Base64 streams not found

[M-Gonzalo]

Closely related to #43, there are lots of Base64 streams in html files, preceded by

"data:text/css;base64,
"data:image/png;base64,
"data:text/html; charset=UTF-8;base64,
...etc

that are not recognized by precomp's parser. paq8px does see them, though.

 195155  doc.html.paq8px193fix2
 256899  doc.html
 256919  doc.html.pcf // 0 streams found
1886137  doc.html.paq8px193fix2.pcf // 8 streams found

Base64.zip

Maybe a good way of avoiding false positives is to look for ;base64, strings.