Properly ignore *.log files.
Improve Grunt support.

* remove clean since concat already overwrites the dist files
* improve JSHint support
* update all devDependencies
* simplify package.json and add `test` script
Update .travis.yml.

* remove node 0.8
* add grunt-cli
Rename jquery.easing.min.js to reflect the fact its not minimized.
Fix JSHint issues and made code style consistent.
Update jQuery to v1.11.1.
Merge pull request #22 from XhmikosR/master

Various tweaks