Merge branch 'master' of github.com:pereckerdal/srfi

Conflicts:
	src/_optionals.scm
	src/and-let.scm
	src/case-lambda.scm
	src/char-set.scm
	src/cond.scm
	src/exception-handling.scm
	src/hash-tables.scm
	src/let-values.scm
	src/lists.scm
	src/sorting.scm
	src/specialize-procedures.scm
	src/strings.scm
	src/tests.scm
	src/time.scm