improve README.md a little.

+# shell-tools
+
 A collection of shell functions and tools I am using.
+
+## Synopsis
+
+Put the files under a directory in your ``${HOME}`` e.g. ``${HOME}/scripts``.
+Then add in your shell profile the following lines:
+
+    . ${HOME}/scripts/init/tmp.sh
+    . ${HOME}/scripts/init/keymanagement.sh
+    . ${HOME}/scripts/init/tools.sh
+    . ${HOME}/scripts/init/vcs.sh
+    
+    ssh-init-agent
+    gpg-init-agent
+
+## Description
+
+After you added the lines above and source your shell profile you got a whole
+bunch of shell functions for various tasks.
+
+Well, the ssh and gpg keys need to be in a valid place and there are also
+other requirements.
+
+**TODO** Write a description for all and everything...
+
+## Requirements
+
+ * Tested with bash but might work with other shells as well.
+
+## Dependencies
+
+The is a huge list of dependencies. Some that come in my mind are:
+
+ * GnuPG
+ * OpenSSH
+ * ImageMagick
+ * GnuCal
+ * Conky
+ * most likely lots of others...
+
+## Contributing
+
+Just write me an email.
+
+## License
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+    
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+    
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+## Author
+
+Georg Hopp <georg@steffers.org>