Merge pull request #919 from Okeanos/master

Updated German language files to latest version
Don't run JSHint on plugins
roots_title() returns a value

Instead of printing the value directly, now the function returns a
value which can printed with echo (like it is in page-header.php) or
stored in a $var when needed.
add a space after the comma L:28
restore apply_filters and switch echo to return
Merge pull request #921 from magox-git/roots_title

roots_title() returns a value
Update to Modernizr 2.7.0
Use main element
Merge pull request #924 from Okeanos/master

Fixed some spelling errors in the German translation files
Updated spanish language to new paths
Merge pull request #927 from jakobhans/update_lang_spanish

Updated spanish language to new paths