Update README.md

Author: tclose

README.md

@@ -1,3 +1,18 @@
-# Pydra-Dcm2Niix
+# Pydra Dcm2Niix Task
 
+This repository aims to be the canonical set of Pydra tasks for incorporating
 A Pydra task interface for the dcm2niix DICOM to NIfTI converter tool (https://github.com/rordenlab/dcm2niix).
+
+Part of this effort is to establish a (mostly) declarative language for describing tasks that
+potentially have intricate rules for determining the availability and names from the choice of
+inputs.
+
+## Installation
+```
+pip install /path/to/pydra-dcm2niix/
+```
+
+### Installation for developers
+```
+pip install -e /path/to/pydra-dcm2niix/[dev]
+```