chg: added functions to deflate and inflate polys
chg: call alg_factor even in trivial cases to get normalized factors
chg: added test for #489
chg: generated res and stat for bug_tr489.tst
fix: remove content from resultant
chg: added a new function SteelTrager to compute the factorization of inseparable
polys over alg. function fields and of polys over alg. function fields given by inseparable min. polys
fix: revert substitution
chg: reminders to self
add: new test for charseries in char p
chg: replace CharSet by mcharset
add: test for charseries mod p
Merge pull request #577 from mmklee/libfac_separable

Libfac separable