Allow implicit conversion from Orphan<T> to Orphan<DynamicStruct/DynamicList/DynamicCapability> where applicable.

Fix bug handling absolute source paths with no --src-prefix -- just output to the same directory in this case.

Define new KJ constants for min/max integer values and inf/nan, then remove all use of numeric_limits.

Spin off libraries kj-async and capnp-rpc, so that people who don't want them can avoid their large footprint.

Implement two-party network.  The first RPC call over a socket took place at 2013-11-08 14:46:43 -0800 and completed successfully.

Add tests for actually receiving multiple signals and multiple polls at once, not just listening for them.

fix typos in error message and comment

Add zero arg constructor and `getType` to DynamicValue::Pipeline