Make sure code handles large arrays of params
Readonly::XS is obsolete
Use Test::Requires
Add test which segfaults
Use Test::NoTabs instead of NoTabsTests
Doc state() pod fix
Fix bug with Readonly hash as spec - check that value is not 0x0 before using it
Remove pointless call to SvTAINTED_off
Add more taint tests including test for tainted params
Fix taint errors with tainted params and XS code for Perl 5.14+