Switch to ByteBuffer for Protobuf read and write
Remove max AIS size setting
Remove SerializationType
New metadata layout in PSSM
merge nathanlws: New, and simplified, (PersistitStore)SchemaManager metadata storage

Merge pull request #1002 from nathanlws/sql-layer/new-schema-manager-metadata
https://github.com/FoundationDB/sql-layer/pull/1002
Add Types, Type_attibutes, Type_bundles tables to basic IS tables.
Remove trivially unused ErrorCodes
Add a connection delay if the server is handling too many (configurable)
connections.
Add sensible defaults.
Update hard limit to consistent default value
Fix the tests affected by the new IS tables.
merge tjoneslo: Add Types, Type_attibutes, Type_bundles tables to basic IS tables.

Merge pull request #1004 from tjoneslo/sql-layer/information-schema-types
https://github.com/FoundationDB/sql-layer/pull/1004
merge nathanlws: Remove trivially unused ErrorCodes

Merge pull request #1005 from nathanlws/sql-layer/remove-unused-error-codes
https://github.com/FoundationDB/sql-layer/pull/1005
merge tjoneslo: Server connect delay

Merge pull request #1006 from tjoneslo/sql-layer/server-connect-delay
https://github.com/FoundationDB/sql-layer/pull/1006