1 - Fix _load_module to deal with pre-existing subpackages
4 - Add explanation of Moo's existence
5 - Change @ISA setting mechanism to deal with a big in 5.10.0's get_linear_isa
6 - Change 5.10 checks to >= to not try and load MRO::Compat on 5.10.0
7 - Make 'perl -Moo' DTRT