Log Message:
Import pdfgrep-1.1 as wip/pdfgrep.

Pdfgrep is a tool to search text in PDF files. It works similar to
grep.

Features
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* search for regular expressions.
* support for some important grep options, including:
      o filename output.
      o page number output.
      o optional case insensitivity.
      o count occurrences.
* and the most important feature: color output!