Install schema.capnp and c++.capnp to $PREFIX/include/capnp.  Make sure /usr/include and /usr/local/include are in the capnpc search path.  Fix Makefile bug related to ridiculous gmake implicit rules.  And update the docs a bit.
Improve makefiles to the point that make distcheck works.
Fix issue 10 -- make capnpc print error message when input file does not exist.
Add --version option to capnpc (issue 12)