Make version() return <name> <x.y.z> <details> to be slightly more like Postgres.
Remove version_full, which just returned that extra info and doesn't correspond to any other dialect that I can tell.
merge MMcM: Make version() return <name> <x.y.z> <details> to be slightly more like Postgres

Merge pull request #983 from MMcM/akiban-server/version-string
https://github.com/FoundationDB/sql-layer/pull/983