merge: Update ports and sauce tasks. (ibolmo/mootools-core#15)
IE6, and iPhone VM's are inconsistent, so leaving those out.
Updating karma:sauce tasks with acceptable ports, otherwise the browsers
in sauce labs won't be able to proxy properly.
* ports-and-sauce:
Cleanup travis.yml
Removing need to have travis install grunt-cli globally.
Removing commented grunt tasks. Correct spaces to tabs.
Changing ports. Adding platforms.
Updating node version and env variables.
Relocating curl in .travis.yml
Travis will be testing sauce tasks.
Separating browser tests into groups of 3 because we currently Sauce Labs offers OpenSauce accounts 3 concurrent browsers.
Removing trailing comma to see if it's preventing browsers from loading.
Setup travis + sauce + karma