Cap'n Proto C++ library

 Similar to Protocol Buffers, Cap'n Proto is an efficient means of
 serializing structured data to be transferred across a network or
 written to disk. Users write a Cap'n Proto definition file that
 drives a code generator, which in turn emits C++ code for encoding &
 decoding messages in the Cap'n Proto format.
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 In addition to being extremely fast, Cap'n Proto also smooths over some
 of the rougher aspects of Protocol Buffers & introduces a number of new
 features to boot.
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 This package contains the runtime libraries needed for C++ applications.