add tendermint p2p configuration defaults to server_config.toml; TODO: address also in default construction

applied to discuss-eris-gateway branch
https://github.com/eris-ltd/eris-db/commit/4769e410880a6daa7a6d2b5d1d7d3c86137223f2



Signed-off-by: Benjamin Bollen <ben@erisindustries.com>

load PrivateValidator (with TODOs)
correction to GenesisFile loading

Move Pipe interface to definitions to avoid cyclical imports;
Improve ErisMint startState; genesisDoc assertion, documentation

Implement Pipe explicitly for ErisMint (placeholder);


Signed-off-by: Benjamin Bollen <ben@erisindustries.com>

include application manager into config loading;

Signed-off-by: Benjamin Bollen <ben@erisindustries.com>

Start Application interface from TMSP provided template; this is a starting point; where E-DB can restructure this interface for a more capable pipe, while maintaining compativility with Tendermint-TMSP