Add some colors

Update readme with icon

README.md

@@ -1,5 +1,6 @@
-Uniterm
+<img src="icons/uniterm.png" width="24" height="24" alt="icon" /> Uniterm
 =======
+
 An experimental cross-platform terminal emulator based on [hterm](https://chromium.googlesource.com/apps/libapps/+/master/hterm), [node-pty](https://github.com/Tyriar/node-pty) and [Electron](https://electron.atom.io). Most of the code here are adopted from my another experimental project [Replio Standalone](https://github.com/JLChnToZ/replio/tree/standalone).
 
 Install
@@ -18,7 +19,7 @@ $ npm run package
 ```
 
 ```
-Usage: uniterm [options] <cmd> [args...]
+Usage: uniterm [options] [--] <cmd> [args...]
 
 Options:
 

lib/shells/minsh.js

@@ -15,7 +15,7 @@ const shellCommands = {
       let message = 'There are no too many built-in commands in this shell, except for:\n';
       for(let cmdname in shellCommands) {
         const cmd = shellCommands[cmdname];
-        message += `  \`\x1b[36;1m${cmdname}\x1b[0;36;3m${cmd.args ? (' ' + cmd.args) : ''}\x1b[0m\`: ${cmd.description}\n`;
+        message += `  \`\x1b[36;1m${cmdname}${cmd.args ? (' \x1b[0;36;3m' + cmd.args) : ''}\x1b[0m\`: ${cmd.description}\n`;
       }
       message += 'All other commands will be parsed as external command with ' +
         'arguments and run directly in current tab.\n' +
@@ -50,7 +50,7 @@ const shellCommands = {
           throw new Error(errno.code.ENOTDIR.description);
         this.cwd = newPath;
       }
-      this.console.log('Current working directory is:', this.cwd);
+      this.console.log(`Current working directory is: \x1b[36m${this.cwd}\x1b[0m`);
     }
   },
   'set': {
@@ -75,15 +75,15 @@ const shellCommands = {
     action() {
       let message = 'Registered environment variables:\n';
       for(let key in this.env)
-        message += `  ${key} = ${this.env[key]}\n`;
+        message += `  \x1b[33;1m${key}\x1b[0m = \x1b[33m${this.env[key]}\x1b[0m\n`;
       this.console.log(message);
     }
   },
   'start': {
     args: 'command [args...]',
     description: 'Run an external command in new tab',
     action(line) {
-      this.console.log(`Launch "${line[0]}" in new tab...`);
+      this.console.log(`Launch \`\x1b[36;1m${line[0] || 'minsh'}\x1b[0m\` in new tab...`);
       new TerminalHost(line.length ? new ExecShell(line, this.cwd, this.env) : new MinShell(this.cwd, this.env));
     }
   },