Doc-deprecate

Ref Level/community#113

Author: vweevers

README.md

@@ -1,6 +1,8 @@
 # level-js
 
-> An [`abstract-leveldown`][abstract-leveldown] compliant store on top of [IndexedDB][indexeddb].
+**An [`abstract-leveldown`][abstract-leveldown] compliant store on top of [IndexedDB][indexeddb].**
+
+> :pushpin: This module will soon be [deprecated](https://github.com/Level/community/issues/113), because it is superseded by [`browser-level`](https://github.com/Level/browser-level).
 
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