Stop manipulating line/column numbers

Traceur already corrects for 0-index line and 1-index column numbers,
so this shouldn’t be doing it too.
Merge pull request #17 from christianbundy/line-column-numbers

Stop manipulating line/column numbers
Use a DRY regex

Completely trivial, but it’s easier to use a positive lookahead and
replace `next` with `now` rather than replace `.next.js` with `.now.js`.
Merge pull request #19 from christianbundy/dry-regex

Use a DRY regex
Use + to denote version metadata

In accordance with rule 10 from Semantic Versioning 2.0.0