copy realclassify_2.tex to realclassify_3.tex
divide the content between realclassify_2.tex and realclassify_3.tex

Between the abstract and the bilbiography, we now have
realclassify_2.tex + realclassify_3.tex = realclassify_{2,3}.tex as it was.

section on the structure of the equivalence classes
  --> realclassify_2.tex
all the rest
  --> realclassify_3.tex
remove sections already included in part 1 from realclassify_3.tex

removed sections are:
- splitting lemma
- factorization results
- algorithms for simple singularities
add section titles to realclassify_2.tex