gitignore update

.gitignore

@@ -1,5 +1,3 @@
-.DS_STORE
-
 ## Core latex/pdflatex auxiliary files:
 *.aux
 *.lof
@@ -21,7 +19,10 @@
 # these rules might exclude image files for figures etc.
 # *.ps
 # *.eps
-/*.pdf
+*.pdf
+
+!/logistica tirocinio/*
+.DS_STORE
 
 ## Bibliography auxiliary files (bibtex/biblatex/biber):
 *.bbl