support CJK string annotation; print readably CJK string in scrapely.tool's output

scrapely.tool will crash when using CJK string as annotation in scrapely.tool:

```
$ python -m scrapely.tool blog.json
scrapely> ta http://blog.douban.com/douban/2013/07/04/2630/
[0] http://blog.douban.com/douban/2013/07/04/2630/
scrapely> t 0 算法工程师如何改进豆瓣电影 TOP250
Traceback (most recent call last):
  File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/runpy.py", line 162, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/Users/xyb/scrapely.xyb/scrapely/tool.py", line 189, in <module>
    main()
  File "/Users/xyb/scrapely.xyb/scrapely/tool.py", line 186, in main
    t.cmdloop()
  File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/cmd.py", line 142, in cmdloop
    stop = self.onecmd(line)
  File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/cmd.py", line 221, in onecmd
    return func(arg)
  File "/Users/xyb/scrapely.xyb/scrapely/tool.py", line 48, in do_t
    selection = apply_criteria(criteria, tm)
  File "/Users/xyb/scrapely.xyb/scrapely/tool.py", line 147, in apply_criteria
    sel = tm.select(func)
  File "scrapely/template.py", line 48, in select
    score = score_func(fragment, htmlpage)
  File "scrapely/template.py", line 95, in func
    if text in fdata:
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe7 in position 0: ordinal not in range(128)
```

I fixed it, and add improved the usability of scrapely.tool's output that including CJK unicode characters: 

```
$ python -m scrapely.tool blog.json
scrapely> t 0 算法工程师如何改进豆瓣电影 TOP250
[0] u'<h1>算法工程师如何改进豆瓣电影 TOP250</h1>'
[1] u'<title>豆瓣blog  &raquo; Blog Archive   &raquo; 算法工程师如何改进豆瓣电影 TOP250</title>'
[2] u'<link rel="alternate" type="application/rss+xml" title="豆瓣blog &raquo; 算法工程师如何改进豆瓣电影 TOP250 评论 Feed" href="http://blog.douban.com/douban/2013/07/04/2630/feed/" />'
scrapely> 
```