To avoid isonomy because the files are indexed by the TeX distribution

It works because Refresh File Name Database also localizes the resources

Margins too wide when no option (oneside or twoside) given to \documentclass

In notitlpage option with single logo

The logos are available for everyone on École polytechnique's site.

*Code for titlepage and notitlepage options no more delayed with \AtBeginDocument, it is declared in the right place with an auxiliary command
*Added layout for a second logo with the notitlepageoption, layout made by DIRCOM

In TEXMFMAIN/tex/latex/polytechnique no more subdirectory resources that was ignored during LaTex compilation. Added source files in TEXMFMAIN/source/latex/polytechnique.