Make create shard space endpoint database specific.

Fixes #831. Shard spaces now belong to a database so the endpoint should reflect that.
Series should be returned in sorted order

Fix #830. Tests and implementation to ensure that list series with or without a regex return in sorted order. Queries that select from a regex will return series in sorted order.
Merge pull request #833 from influxdb/830-series-sorted-order

Series should be returned in sorted order
Merge pull request #832 from influxdb/831-create-shard-space

Make create shard space endpoint database specific.
Update CHANGELOG.md
Update CHANGELOG.md
Update CHANGELOG.md
ensure close file before rename bookmark file.
makes listServers api more informative
Merge pull request #850 from oliveagle/more_informative_api_get_servers

makes listServers api more informative
Add admin assets fix to CHANGELOG.
Merge pull request #849 from runner-mei/gs2

ensure close file before rename bookmark file.
Update database configuration to validate shard spaces before creating anything.

Fixes #860. Update the validate method on shard spaces to optionally check if the database exists.
Add optional pausing to data migration.
Merge pull request #861 from influxdb/860-validte-shards

Update database configuration to validate shard spaces before making db
Merge pull request #863 from influxdb/862-slow-data-migrator

Add optional pausing to data migration.
Don't ever try to query or write against a shard that is closed or deleted.

Uses a RWlock so there's no global lock on writes or queries.
Update CHANGELOG.md
Merge pull request #866 from influxdb/779-threadsafe-shard-deletion

Don't ever try to query or write against a shard that is closed or delet...
validate that shard spaces have a non-empty regex