Add README.md

Signed-off-by: Alexander Shorin <kxepal@apache.org>
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+# couchdb-jquery-couch
+
+$.couch is used to communicate with a CouchDB server.
+
+## Tests
+
+Install the dependencies:
+
+```
+$ bower install
+```
+
+Open `test/runner.html` in a browser to run the testsuite.