typos in readme, more on installation and contact field

README.md

@@ -36,7 +36,7 @@ Known problems
 - OpenMP implementation is EXPERIMENTAL (passes tests but needs more work)
 
 
-Please not that the code is still under heavy development. 
+Please note that the code is still under heavy development. 
 You'll probably find bugs so please report them!
 
 Authors

docs/Install.rst

@@ -57,3 +57,37 @@ You can also use pip ::
    pip install muesr-0.1.tar.gz
 
 (you'll probably need to be superuser)
+
+Installation in virtualenv
+--------------------------
+
+Virtualenv offers a simple way of virtualizing the Python environment.
+This means that you can have a separate collection of python packages 
+for running Muesr (and install Muesr itself) without affecting the Python
+installation system-wide.
+
+To install Muesr in a virtualenv, first make sure that the command `virtualenv`
+is available on your system. If not, please check online what is the 
+recommended way of installing virtualenv in your os.
+
+To create the virualenv run in a terminal:
+
+   virtualenv muesr-env
+
+and to activate the environment (linux and OsX)
+
+   cd muesr-env
+   source bin/activate
+
+now you can install Muesr in the virtualenv with the command
+
+   pip install https://github.com/bonfus/muesr/archive/master.tar.gz
+
+this will only provide the minimal dependencies. To have access to all 
+Muesr functions you also need `spglib` and `PyYAML`
+
+   pip install pyyaml spglib
+
+Now you are ready to go! Why not start with Muesr examples?
+
+

docs/Tutorial.rst

@@ -180,7 +180,7 @@ with the following command ::
 
     >>> from muesr.engines.clfc import locfield
 
-A detailed description of the possible calculatros is given in the 
+A detailed description of the possible calculators is given in the 
 :py:func:`~muesr.engines.clfc.locfield` documentation.
 
 Let's go straight to the local field evaluation which is obtained by 
@@ -230,7 +230,13 @@ In the next tutorial we will discuss the Hyperfine Contact Field.
 The Contact field contribution
 ------------------------------
 
-TODO
+In muesr, the current implementation of the contact field only allows a 
+scalar interaction between a set of nearest neighbouring magnetic atoms
+and the muon. This is generally insufficient to describe the contact 
+hypefine field but it can be a reasobale approximation in ferromagnets.
+
+TODO: discuss the details.
+