diff --git a/.gitignore b/.gitignore
index 8f56454..225807f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,5 @@
 .DS_Store
 /vendor
 /composer.lock
-/tests/Resources/*/actual/*
\ No newline at end of file
+/tests/Resources/*/actual/*
+composer.phar
diff --git a/README.devel.txt b/README.devel.txt
new file mode 100644
index 0000000..1d7ffb2
--- /dev/null
+++ b/README.devel.txt
@@ -0,0 +1,10 @@
+The following steps can be performed to setup a development environment.
+
+Download composer.phar as described at https://getcomposer.org/download/
+
+Execute composer:
+  php composer.phar update
+
+Execute phpunit tests:
+  ./vendor/bin/phpunit
+