added installation instructions

README.md

@@ -31,3 +31,20 @@ Also, for each dependency the specified versions (git hash) are "checked out" an
 To see default settings and learn the command line arguments, run:
 
 	$ ../bin/git_deps_py --help
+
+# Installation
+
+## From Git
+
+1. clone the git repository
+
+		$ git clone https://github.molgen.mpg.de/EditionOpenAccess/git_deps_py.git
+
+1. checkout the right version
+
+		$ cd git_deps_py
+		$ git checkout 0.1
+
+1. install into your PATH via pip
+
+		$ pip install --user .