[bithorde.proto]Fix a couple of broken comments.
[cmake]Build python protocol-buffers-stub.
[template.config]Fix redundant loop.
[python/bithordetest]Prepare a basic BitHorde-testing module in python.
[bithorded/server/config]Exit if failed to open config.
[python/bithordetest]Add code to launch and control bithorded during testing.
Pass on timeout when forwarding read-requests.
[bithorded/cache/manager]Avoid signed-comparison-warnings.
Change explicit references to boost::filesystem3 into boost::filesystem.
[lib/asset]Implement tracking of individual ReadRequest:s with working timeout-handling.