update version number and add changelog

CHANGELOG.md

@@ -0,0 +1,9 @@
+# 0.1.0
+
+- Modified interface to conform to Tilesource interface:
+  - `tile(x, y, z, callback)` is now `getTile(z, x, y, callback)`. Note the changed order of arguments.
+  - `grid(x, y, z, callback)` is now `getGrid(z, x, y, callback)`. Note the changed order of arguments.
+  - Added `getInfo(callback)` method.
+- Removed `index.js` with `pool`, `serve` and `store` functions.
+- MBTiles objects now create their databases as a singleton. There's no need to add additional pooling around MBTiles objects; you can create as many as you want.
+- The constructor now takes Tilesource URIs (e.g. mbtiles:///path/to/file.mbtiles) as strings and parsed URIs as a hash.