Improved Gulp / Karma config

- Updated devDependencies
- Moved Node testing to Gulp
- Preparations for Sauce Labs browser testing
Sauce Labs browser testing #1
Sauce Labs browser testing #2
Sauce Labs browser testing #3

- Will this show the failed IE7 tests?
Mention <= IE8 incompatibility

- Disable IE7, IE8 testing
- Added 'Compatibility' section to README
No need for screenshots
Bump version
Improved Gulp / Karma config
- Updated devDependencies
- Moved Node testing to Gulp
- Sauce Labs browser testing
Merge branch 'canary' of https://github.com/marklagendijk/lodash-deep into canary