README: Add security notes, and known bugs and problems
t/bytecode.t: force Bytecode56 on 5.6

but even this does not work
1.45_08: Replace each %hash with foreach keys (#307)

In B::C, Bytecode and CC.
The big issues were only hash traversal (B::HV::hwalk) in Bytecode
and B::walksymtable in B::C
CC: keep each %$declare
C: save @ISA of considered packages, esp DynaLoader

Fixes the ISA dependent #308 bugs. Not the %Config Errno.pm related bugs

add t/issue308.t
Merge remote-tracking branch 'origin/dl-308' into each-hash

Fixed Conflicts:
	Changes