Correction Taylor reste d'ordre 3
Merge pull request #95 from FHachez/master

[ProStoch] correct some misspelling
Merge pull request #94 from anpar/master

Correction Taylor reste d'ordre 3
Add missing images - autolin q6
Fix spectral density - prostoch q6
Fix typos - eco q4
Fix typos in first page
Add diagram of paradigms - oz q6
Explain n-1 for variance - stat q5
Add some unfinished text - oz q6
Add explanation about FFT -- sigsys q4
Fix ortho
Fix ortho titlepage
Merge pull request #96 from alegat/master

Fix ortho
Add a synthese: Calculability