typo fix
credit to David Steinbrunner for typo fix
Add encoding support

1. now possible to pick an encoding via the "use" statement

    use M:L:R -readers => { encoding => ... }

2. default is "encoding(UTF-8)"

3. (read|write)_file now take options hashref and allow 'encoding'
rename 'encoding' option to 'binmode' for clarity
changelog for encoding
v0.100

        - add binmode option to set binmode on opened filehandles; this
          defaults to encoding(UTF-8); thanks, David Golden!
        - typo fix by the inimitable David Steinbrunner