Adds proto serialization to Random class and adds prototest to validate it.
Adds cmake script for generating Cap'n Proto C++ files, updates
CMakeLists to use the new script and adds prototest example script for
profiling proto runtimes.
Explicitly specify Cap'n Proto output dir. There is a mismatch between actual output location and the one set in CAPNP_SRCS without this for some reason.
Remove trailing whitespace from test files for random class.
Adds test case for Cap'n Proto serialization of Random class.
Update linux64 Cap'n Proto lib/bin with working versions.
Update darwin64 binaries for Cap'n Proto.
Updates cmake file to get the build working on linux64 by adding
kj/capnp to COMMON_LIBS.
Merge pull request #246 from scottpurdy/capnp-random

Adds proto serialization to Random class with prototest example