conducting Find & Replace on 'Seperator' and 'Separator' spelling change

@daytonn Did a quick find and replace on the JSKit files for the `seperator` misspellings. I did notice that some of the npm modules likewise use the `seper` spelling, so you might have been following that convention for that reason.

All tests pass after the changes within.

If you decide not to make this switch, just close and I'll change back the README syntax changes, as well.