Improve compatibility with Ruby 1.8.6

Replacing the 'chars' method with this
split is equivalent and Unicode-safe while
functioning on the version of Ruby included
on CentOS 4.

Originally submitted at:

  https://github.com/wincent/Command-T/pull/48

Signed-off-by: Greg Hurrell <greg@hurrell.net>
Remove unnecessary `#to_a` call

I believe `#scan` will always return an array, so this isn't needed.
doc: Add Emily Strickland to AUTHORS section
Merge branch 'gh/pull/48' into next

* gh/pull/48:
  doc: Add Emily Strickland to AUTHORS section
  Remove unnecessary `#to_a` call
  Improve compatibility with Ruby 1.8.6