xcc -e and xcc -w

This pull request implements xp-framework/rfc#238 and adds a command line option to evaluate and run sourcecode:

### xcc -e
```sh
# XP Language
$ xcc -e xp 'util.cmd.Console::writeLine($args);' 1 2 3
[
  0 => "1"
  1 => "2"
  2 => "3"
]

# PHP 5.3 (no-alternative-syntax)
$ xcc -e php '\util\cmd\Console::writeLine($args);' 1 2 3
[
  0 => "1"
  1 => "2"
  2 => "3"
]
```

### xcc -w
```sh
# XP Language
$ xcc -w xp '$args.length' 1 2 3
3

# PHP 5.3 (no-alternative-syntax)
$ xcc -w php 'sizeof($args)' 1 2 3
3
```

### Errors
```sh
$ xcc -w xp 'parse@error'
*** @xp.compiler.io.CommandLineSource(syntax= xp, fragment= `return parse@error;`):
Exception text.parser.generic.ParseException (1 parse error(s) occurred.)
  - text.parser.generic.ParserMessage(4: Syntax error at Command line argument, 
  line 1 (offset 110): Unexpected '@', expected one of ['(', '.'])

```