Fix some error positioning

• Modernize linter -> remove cruft
• Update error positioning code in split_match

Smart --filename

For jshint to find its configuration we need to pass in a --filename. We pass in a fake filename
${folder}/unsaved.js for new, unsaved files. 🤞

1.3.3: Merge pull request #112 from SublimeLinter/sl4-cleanup

cleanup deprecated stuff and simplify travis test

1.3.2

Merge branch 'fix-wrong-highlight-positions' of https://github.com/Su…

1.3.1

include code in W/E