Remove unneeded spaces from img tags.

Also remove unneeded end tags.
Fix validation error.
Remove unneeded ids from header and footer.
Update JSHint's options.
Update Gruntfile.js.

No need to copy LICENSE.md. Also remove an unneeded copy step.
Fix a:visited properties (SEC7115).

:visited and :link styles can only differ by color.
Update .travis.yml.

Make node.js 0.11 not error out the whole process. If/when 0.11 final is out this should be removed.
Update Respond.js to v1.4.1.
Update modernizr to v2.7.1.
Losslessly compress images a little more.
Update dependencies.
Merge pull request #90 from XhmikosR/master

Minor improvements (2)