docs: Add mention of obstore and obspec to README (#14)

Author: kylebarron

README.md

@@ -4,6 +4,11 @@ An asynchronous [PMTiles] reader for Python.
 
 The [PMTiles format] is a cloud-native, compressed, single-file archive for storing tiled vector and raster map data.
 
+This implementation is fully asynchronous and integrates with [Obstore] and [Obspec] for efficiently loading data from remote files.
+
+[Obstore]: https://developmentseed.org/obstore/latest/
+[Obspec]: https://developmentseed.org/obspec/latest/
+
 [PMTiles]: https://docs.protomaps.com/
 [PMTiles format]: https://docs.protomaps.com/pmtiles/
 
@@ -17,6 +22,8 @@ pip install async-pmtiles
 
 ## Example
 
+The easiest way to get started is by using [Obstore] to fetch remote data.
+
 ```python
 from async_pmtiles import PMTilesReader
 from obstore.store import HTTPStore

src/async_pmtiles/_reader.py

@@ -130,7 +130,10 @@ async def metadata(self) -> dict:
         return json.loads(metadata)
 
     async def get_tile(self, x: int, y: int, z: int) -> Buffer | None:
-        """Load data for a specific tile given its x, y, and z coordinates."""
+        """Load data for a specific tile given its x, y, and z coordinates.
+
+        Note that no decompression is applied.
+        """
         tile_id = zxy_to_tileid(z, x, y)
 
         dir_offset = self.header["root_offset"]