readme - add gulp task

https://github.com/sindresorhus/gulp-jscs
Merge pull request #108 from sindresorhus/patch-1

readme - add gulp task
Merge pull request #118 from mikesherov/quotmark

Add validateQuoteMarks rule, closes #106
Merge pull request #115 from mikesherov/sub

Add requireDotNotation rule
Merge pull request #121 from mikesherov/camelcase

add requireCamelCaseOrUpperCaseIdentifiers rule
Merge pull request #113 from mikesherov/strictcomma

Add comma and line break rules
Adds requireOperatorBeforeLineBreak, closes #104