Fixed bob.math requirement (cf. bob.math#12 and bob.learn.em!29)

changed title from Fixed bob.math requirement (cf. bob.math#12 (closed) and bob/bob.learn.em#12) to Fixed bob.math requirement (cf. bob.math#12 (closed) and bob/bob.learn.em#24)

changed title from Fixed bob.math requirement (cf. bob.math#12 (closed) and bob/bob.learn.em#24) to Fixed bob.math requirement (cf. bob.math#12 (closed) and bob/bob.learn.em!29)

merged

mentioned in commit 5698206b