hash.eqv method
replace "\n" with system property so test runs on all platforms
array.first should return undef when no element satisfies the predicate
Looks like parser doesn't need the class sigil any more.
remove no-longer-needed class sigil marker
tests for hash.eqv and more
more examples in 99-problems
Merge pull request #103 from MoeOrganization/prakashk/misc-stuff-2

Various things (sans the REPL-scope commit)