v1.2.0

PDFio 1.2.0 is a feature release. Changes include:

• Now use autoconf to configure the PDFio sources (Issue #54)
• Added pdfioFileCreateNumberObj and pdfioFileCreateStringObj functions
  (Issue #14)
• Added pdfioContentTextMeasure function (Issue #17)
• Added pdfioContentTextNewLineShow and pdfioContentTextNewLineShowf
  functions (Issue #24)
• Renamed pdfioContentTextNextLine to pdfioContentTextNewLine.
• Updated the maximum number of object streams in a single file from 4096 to
  8192 (Issue #58)
• Updated the token reading code to protect against some obvious abuses of the
  PDF format.
• Updated the xref reading code to protect against loops.
• Updated the object handling code to use a binary insertion algorithm -
  provides a significant (~800x) improvement in open times.
• Fixed handling of encrypted PDFs with per-object file IDs (Issue #42)
• Fixed handling of of trailer dictionaries that started immediately after the
  "trailer" keyword (Issue #58)
• Fixed handling of invalid, but common, PDF files with a generation number of
  65536 in the xref table (Issue #59)

Enjoy!