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-zipalign -- zip archive alignment tool
-
-usage: zipalign [-f] [-v] <align> infile.zip outfile.zip
-
-  -f : overwrite existing outfile.zip
-  -v : verbose output
-  <align> is in bytes, e.g. "4" provides 32-bit alignment
-  infile.zip is an existing Zip archive
-  outfile.zip will be created
-
-
-The purpose of zipalign is to ensure that all uncompressed data starts
-with a particular alignment relative to the start of the file.  This
-allows those portions to be accessed directly with mmap() even if they
-contain binary data with alignment restrictions.
-
-Some data needs to be word-aligned for easy access, others might benefit
-from being page-aligned.  The adjustment is made by altering the size of
-the "extra" field in the zip Local File Header sections.  Existing data
-in the "extra" fields may be altered by this process.
-
-Compressed data isn't very useful until it's uncompressed, so there's no
-need to adjust its alignment.
-
-Alterations to the archive, such as renaming or deleting entries, will
-potentially disrupt the alignment of the modified entry and all later
-entries.  Files added to an "aligned" archive will not be aligned.
-
-By default, zipalign will not overwrite an existing output file.  With the
-"-f" flag, an existing file will be overwritten.
-