An extension of the sled crate that allows for accessing a sled::Tree via a
client/server API using the hyper web framework crate.
| HTTP Request | Description
|-----------------------------------|--------------------------------------
| GET /tree/entries/get | Get a Tree entry by key.
| DELETE /tree/entries/del | Delete a Tree entry by key.
| POST /tree/entries/set | Set a new Tree entry by key/value pair.
| PUT /tree/entries/cas | Perform a compare-and-swap.
| POST /tree/entries/merge | Merge a value into an entry for a key.
| POST /tree/entries/flush | Flush and pending IO.
| GET /tree/entries/iter | Iterate over all Tree entries.
| GET /tree/entries/scan | Iterate over all Tree entries starting from a key.
| GET /tree/entries/scan_range | Iterate over all Tree entries within a key range.
| GET /tree/entries/max | Get the greatest Tree entry.
| GET /tree/entries/pred | Get the Tree entry preceding a key.
| GET /tree/entries/pred_incl | Get the Tree entry preceding or including a key.
| GET /tree/entries/succ | Get the Tree entry succeeding a key.
| GET /tree/entries/succ_incl | Get the Tree entry succeeding or including a key.
See the request module for the expected request types. The server expects the
corresponding request type serialized to JSON within the Body of the received
Request.
See the response::response function for the associated responses, their status
and layout.