[etwist] Generates apache's mod_concat-like urls for js and css Uses the lists of js, css and ie_css included in order to generate urls compatible with Apache mod_concat (ie: http://test.fr/??file1.js,file2.js). Css files may use `media` option or may be for IE only ; this patch does not concatenate css filenames for different media types or different IE specs. It concatenates only files served under cubicweb's `data` urls and keeps original include order. The generated urls are added to the HTML header as usual. HOW-TO: - calling HTMLHead(datadir_url) will enable the url concatenation - calling HTMLHead() will not benefit of url concatenation IMPORTANT NOTE: - fckeditor can no more be served under `/data/` segment

function datetuple(d) {
    return [d.getFullYear(), d.getMonth()+1, d.getDate(), 
	    d.getHours(), d.getMinutes()];
}
    
function pprint(obj) {
    print('{');
    for(k in obj) {
	print('  ' + k + ' = ' + obj[k]);
    }
    print('}');
}

function arrayrepr(array) {
    return '[' + array.join(', ') + ']';
}
    
function assertArrayEquals(array1, array2) {
    if (array1.length != array2.length) {
	throw new crosscheck.AssertionFailure(array1.join(', ') + ' != ' + array2.join(', '));
    }
    for (var i=0; i<array1.length; i++) {
	if (array1[i] != array2[i]) {
	    
	    throw new crosscheck.AssertionFailure(arrayrepr(array1) + ' and ' + arrayrepr(array2)
						 + ' differs at index ' + i);
	}
    }
}