Delete libraries that I will get from elpa
Upstream changes
Add roman calendar files
Code to make a thin modeline
Cosmetic changes in latex
icons in org-mode tags
Geographic settings
Include ido
Code to manage org-mode appointments
New file with the code to manage references in org
Code borrowed from Prelude for elpa

Allows to declare a list of packages to check at start, downloading the
missing ones
Load the new files, and adapt to elpa packages