Compress gui/images/go-home.png a little more.
Update .htaccess to the latest html5 boilerplate.
Update deps and .jshintrc.

JSHint 2.1.4 comes with a `shelljs` option which we can use instead of defining the individual globals.
Run lupdate.
Update Serbian localization
testrunner: Added REGISTER_TEST. Thanks lucasmrod.
testrunner: removed redundant ';'
CLI: Added --environment flag