[TASK] Updated README

README

+###############################################################################
+# About hshetl
+###############################################################################
+
 hshetl is a cli tool for extract transform load data between different sources.
 
-Currently supported sources are files, ldap, oracle and mysql.
+Currently supported sources are
+ - files
+ - ldap
+ - oracle
+ - mysql
 
 ###############################################################################
 # Install on Debian
 ###############################################################################
 
-Install the tool by using the setup.py script. It resolves all dependencies. Currently the setup was only tested
-on debian based linux distributions.
+Install the tool by using the setup.py script. It resolves all dependencies.
+Currently the setup was only tested on debian based linux distributions.
 
 You will need to following packages for the building process:
  - python-dev
@@ -18,7 +26,8 @@ You will need to following packages for the building process:
  - libssl-dev
  - mercurial
 
-sudo apt-get install python-dev python-setuptools libmysqlclient-dev libldap2-dev libsasl2-dev libssl-dev mercurial
+sudo apt-get install python-dev python-setuptools libmysqlclient-dev \
+libldap2-dev libsasl2-dev libssl-dev mercurial
 
 You also need to run pip install -U distribute, because we need a higher
 version of it.
@@ -43,3 +52,33 @@ deactivate
 ###############################################################################
 We used nosetests to run the included unittests. Install it and run nosetests
 from inside the package directory ./hshetl
+
+If you want to run the tests from within your IDE, configure it to use nose
+as the test runner. We have tested this with Eclipse and PyDEV IDE.
+
+###############################################################################
+# Usage
+###############################################################################
+
+usage: hshetl [-h] [-p path] [config]
+
+A tool that hustles data.
+
+positional arguments:
+  config                The path to the configuration file. An absolute path
+                        is taken as it is. Relative paths are relative to the
+                        config directory A relative path starting with . is
+                        relative to your working directory (default:
+                        config.yml)
+
+optional arguments:
+  -h, --help            show this help message and exit
+  -p path, --path path  The path where config files are expected. Note that
+                        this is only respected when the config does *not*
+                        start with / or . (default: /home/username/.hshetl/)
+
+The tool completely depends on a YAML formatted configuration file. Above
+you can see how to specify the place of the config file.
+
+If you install the tool on your computer a sample configguration file is
+placed inside /home/username/.hshetl/config.yml.sample
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