Add cpdf cheatsheet

cpdf is a tool to slice and dice PDFs

I created this sheet on a boring day by copying text from
[here](http://www.coherentpdf.com/usage-examples.html) and then
cleaning things up a bit.

cheat/cheatsheets/cpdf

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+# Read in.pdf, select pages 1, 2, 3 and 6, and write those pages to
+# out.pdf
+cpdf in.pdf 1-3,6 -o out.pdf
+
+# Select the even pages (2, 4, 6...) from in.pdf and write those pages
+# to out.pdf
+cpdf in.pdf even -o out.pdf
+
+# Using AND to perform several operations in order, here merging two
+# files together and adding a copyright stamp to every page.
+cpdf -merge in.pdf in2.pdf AND -add-text "Copyright 2014" -o out.pdf
+
+# Read control.txt and use its contents as the command line arguments
+# for cpdf.
+cpdf -control control.txt
+
+# Merge in.pdf and in2.pdf into one document, writing to out.pdf.
+cpdf -merge in.pdf in2.pdf -o out.pdf
+
+# Split in.pdf into ten-page chunks, writing them to Chunk001.pdf,
+# Chunk002.pdf etc
+cpdf -split in.pdf -o Chunk%%%.pdf -chunk 10
+
+# Split in.pdf on bookmark boundaries, writing each to a file whose
+# name is the bookmark label
+cpdf -split-bookmarks 0 in.pdf -o @N.pdf
+
+# Scale both the dimensions and contents of in.pdf by a factor of two
+# in x and y directions.
+cpdf -scale-page "2 2" in.pdf -o out.pdf
+
+# Scale the pages in in.pdf to fit the US Letter page size, writing to
+# out.pdf
+cpdf -scale-to-fit usletterportrait in.pdf -o out.pdf
+
+# Shift the contents of the page by 26 pts in the x direction, and 18
+# millimetres in the y direction, writing to out.pdf
+cpdf -shift "26pt 18mm" in.pdf -o out.pdf
+
+# Rotate the contents of the pages in in.pdf by ninety degrees and
+# write to out.pdf.
+cpdf -rotate-contents 90 in.pdf -o out.pdf
+
+# Crop the pages in in.pdf to a 600 pts by 400 pts rectangle.
+cpdf -crop "0 0 600pt 400pt" in.pdf -o out.pdf
+
+# Encrypt using 128bit PDF encryption using the owner password 'fred'
+# and the user password 'joe'
+cpdf -encrypt 128bit fred joe in.pdf -o out.pdf
+
+# Decrypt using the owner password, writing to out.pdf.
+cpdf -decrypt in.pdf owner=fred -o out.pdf
+
+# Compress the data streams in in.pdf, writing the result to out.pdf.
+cpdf -compress in.pdf -o out.pdf
+
+# Decompress the data streams in in.pdf, writing to out.pdf.
+cpdf -decompress in.pdf -o out.pdf
+
+# List the bookmarks in in.pdf. This would produce:
+cpdf -list-bookmarks in.pdf
+
+# Outputs:
+
+# Add bookmarks in the same form from a prepared file bookmarks.txt to
+# in.pdf, writing to out.pdf.
+cpdf -add-bookmarks bookmarks.txt in.pdf -o out.pdf
+
+# Use the Split style to build a presentation from the PDF in.pdf,
+# each slide staying 10 seconds on screen unless manually advanced.
+# The first page, being a title does not move on automatically, and
+# has no transition effect.
+cpdf -presentation in.pdf 2-end -trans Split -duration 10 -o out.pdf
+
+# Stamp the file watermark.pdf on to each page of in.pdf, writing the
+# result to out.pdf.
+cpdf -stamp-on watermark.pdf in.pdf -o out.pdf
+
+# Add a page number and date to all the pages in in.pdf using the
+# Courier font, writing to out.pdf
+cpdf -topleft 10 -font Courier -add-text "Page %Page\nDate %d-%m-%Y" in.pdf -o out.pdf
+
+# Two up impose the file in.pdf, writing to out.pdf
+cpdf -twoup-stack in.pdf -o out.pdf
+
+# Add extra blank pages after pages one, three and four of a document.
+cpdf -pad-after 1,3,4 in.pdf -o out.pdf
+
+# List the annotations in a file in.pdf to standard output.
+cpdf -list-annotations in.pdf
+
+# Might Produce:
+
+# -- # Annotation text content 1 # -- # -- # Annotation text content 2
+# --
+
+# Copy the annotations from from.pdf to in.pdf, writing to out.pdf.
+cpdf -copy-annotations from.pdf in.pdf -o out.pdf
+
+# Set the document title of in.pdf. writing to out.pdf.
+cpdf -set-title "The New Title" in.pdf -o out.pdf
+
+# Set the document in.pdf to open with the Acrobat Viewer's toolbar
+# hidden, writing to out.pdf.
+cpdf -hide-toolbar true in.pdf -o out.pdf
+
+# Set the metadata in a PDF in.pdf to the contents of the file
+# metadata.xml, and write the output to out.pdf.
+cpdf -set-metadata metadata.xml in.pdf -o out.pdf
+
+# Set the document in.pdf to open in Acrobat Viewer showing two
+# columns of pages, starting on the right, putting the result in
+# out.pdf.
+cpdf -set-page-layout TwoColumnRight in.pdf -o out.pdf
+
+# Set the document in.pdf to open in Acrobat Viewer in full screen
+# mode, putting the result in out.pdf.
+cpdf -set-page-mode FullScreen in.pdf -o out.pdf
+
+# Attach the file sheet.xls to in.pdf, writing to out.pdf.
+cpdf -attach-file sheet.xls in.pdf -o out.pdf
+
+# Remove any attachments from in.pdf, writing to out.pdf.
+cpdf -remove-files in.pdf -o out.pdf
+
+# Blacken all the text in in.pdf, writing to out.pdf.
+cpdf -blacktext in.pdf -o out.pdf
+
+# Make sure all lines in in.pdf are at least 2 pts wide, writing to
+# out.pdf.
+cpdf -thinlines 2pt in.pdf -o out.pdf
+