header improvements based on @kayleanelson's suggestions
style tweaks for small size screens
Merge pull request #44 from eteq/style-tweaks

Added header and css improvements for small screens
Merge pull request #45 from migueldvb/readme

Fix typos in README.rst file
Convert UVES tutorial to ipython notebook format
Use download_file function to downlaod tar file  with UVES data
Replace :ref: and :math: markup syntax