Added basic detect cli option (single file ATM)

Author: kizu

lib/cli.js

@@ -14,6 +14,7 @@ program
     .usage('[options] <file ...>')
     .option('-v, --verbose', 'verbose mode')
     .option('-c, --config [path]', 'configuration file path')
+    .option('-d, --detect', 'detect mode (would return detected options)')
     .option('-l, --lint', 'in case some fixes needed returns an error')
     .parse(process.argv);
 
@@ -24,6 +25,13 @@ if (!program.args.length) {
 
 var configPath = program.config || (process.cwd() + '/.csscomb.json');
 
+if (program.detect) {
+    var comb = new Comb();
+    comb.detect();
+    console.log(JSON.stringify(comb.processFile(program.args[0]), false, 4));
+    process.exit(0);
+}
+
 if (fs.existsSync(configPath)) {
     var comb;
     var config;