reverse order of <perl vendor site> dirs in @*INC

we do not have to repeat all of the mistakes Perl 5 has made.
nwc10++
update ChangeLog
Bump NQP_REVISION for REPL improvements.
Support lexical type introspection.
Better REPL exception reporting; updates.
Merge remote branch 'origin/nom' into constant-folding
constant folding cleanup

* catch it when the routine to be folded errors out
* make sure to preseve namedness of named arguments
* remove debug output
=> all spectests pass!