thesis.bib: added Abramowitz1972
fonts: fixed disappearance of old-style figures after the update to TL2013
thesis: added a header with the compilation engine (for LatexTools in ST)
chapters/bases: reworked
chapters/bases: fixed typos
chapters/wigner-bec/hamiltonian: added todo
chapters/wigner-bec/cutoff: most of this section was moved to the appendix