mild tweaks to .exrc

make :SD command replace nicely if you need to re-source the .exrc
stop treating lines that being with '*' as comments
-	it's really freaking me out when I'm trying to type lists in wikis ...
augment macro for doing '# line' adjustments

previously could use Alt-R+Alt-L to "reset lines" (that is, recalculating line numbers)
can now use Alt-I+Alt-L to "insert a line" (and will also recalc)
can now use Alt-C+Alt-L to "clear lines" (i.e. get rid of all '# line' lines)
this really helps when debugging things that use Devel::Declare or source filters, which can throw off line numbers, e.g.
-	Method::Signatures
-	TryCatch
-	Switch
-	Shell::POSIX::Select
-	and probably many many more
added menu() to myperl

implemented in separate module, loaded on demand
updated bin/hire to utilize latest myperl features