Release version 1.45.

* You can now add or change a PDF's bookmarks using update_info.
* Added record delimiters to dump_data output to help make parsing
  more reliable.
* The changes to dump_data output (described above) are also now
  required for the input to update_info.
* You can now use multi-character input handles. Prior versions were
  limited to a single character, imposing an arbitrary limitation on
  the number of input PDFs when using handles. Handles still must be
  all upper-case ASCII.
* Added means of referring to PDF pages in reverse order. By
  prefixing a page number with an r, it counts from the end of the
  document. For example, r1 is the last page, r2 is the next-to-last
  page, etc.
* Changed the syntax for page rotation. Instead of N, S, E, W, L, R
  and D, now use: north, south, east, west, left, right and down.
* Fixed a problem reading input PDF filenames that have non-ASCII
  characters on Windows 7.
* Fixed a stream parsing issue with troublesome PDFs that don't
  strictly follow the PDF specification.