Highly oxidation resistant inorganic-porphyrin analog polyoxometalate oxidation catalysts. 2. Catalysis of olefin epoxidation and aliphatic and aromatic hydroxylations starting from .alpha.2-P2W17O61(Mn+.cntdot.Br)(n-11) (Mn+ = Mn3+,Fe3+,Co2+,Ni2+,Cu2+), including quantitative comparisons to metallo