fix typos

specififies → specifies
sucessful   → successful
add encoding to pod

This fixes the following error on metacpan.org:

    Non-ASCII character seen before =encoding in 'döt'. Assuming UTF-8

This also fixes mojibake with perldoc.
convert ISO-8859-1 (latin1) to UTF-8

All the other files were already encoded in UTF-8.
Merge pull request #16 from patch/master

improve docs, from Patch