doc update

Author: AntSimi

doc/index.rst

@@ -6,6 +6,12 @@
 Welcome to py-eddy-tracker's documentation!
 ===========================================
 
+.. toctree::
+   :maxdepth: 2
+   :caption: Installation
+
+   installation
+
 .. toctree::
    :maxdepth: 2
    :caption: Grid manipulation

doc/installation.rst

@@ -0,0 +1,30 @@
+=====================
+How do I get set up ?
+=====================
+
+Source are available on github https://github.com/AntSimi/py-eddy-tracker
+
+Use python3.
+To avoid problems with installation, use of the virtualenv Python virtual environment is recommended or conda.
+
+Then use pip to install all dependencies (numpy, scipy, matplotlib, netCDF4, pyproj, ...), e.g.:
+
+.. code-block:: bash
+
+    pip install numpy scipy netCDF4 matplotlib opencv-python pyyaml pyproj pint polygon3
+
+
+Then run the following to install the eddy tracker:
+
+.. code-block:: bash
+
+    python setup.py install
+
+Several executables are available in your PATH:
+
+.. code-block:: bash
+
+    GridFiltering # Allow to apply a high frequency filter on a NetCDF grid
+    EddyId # Provide identification of eddies for one grid
+    EddySubSetter # Allow to apply sub setting on eddies dataset
+    EddyTracking # Allow to track Identification dataset