some more info in README.md

@@ -25,8 +25,21 @@ really wanted my credentials stored in a way that I can access them
 without clicking to some kind of GUI.
 
 Also these tools don't use a GUI they rely on an running X server instance
-because password values are copied into the X clipboard via xclip. For
-more dependencies look under [DEPENDENCIES](#DEPENDENCIES).
+because password values are copied into the X clipboard via
+[xclip](https://github.com/astrand/xclip). The data will be encrypted with
+[GnuPG](https://www.gnupg.org/) using my private key. Usually my credentials
+for that key are already cached within a running **gpg-agent** instance.
+The storage backend is an [SQLite](https://www.sqlite.org/) (>= 3.6.19)
+database. The default database file to use can be set with the
+**AMNGRDB** environment variable and the GnuPG recipient should be set
+in the **AMNGRID** environment variable. (See [OPTIONS](#options))
+
+After downloading this either via git clone or as an archive just do
+a *make install*. This will install all files under the */usr* **PREFIX**.
+If you want to install somewhere else just do
+*PREFIX=/path/to/go make install*.
+
+For usage see [DESCRIPTION](#description).
 
 ## NAME