Add url template for specific url crawling

[code4craft]

Crawling specific urls instead of discover and crawl links for pages.
Use url template like "http://baike.baidu.com/search/word?word=${word}&enc=utf8" and params as input.
It's similar to harvestman.

[code4craft]

Update goal to "synchronize api calling". You can use spider like:

        OOSpider ooSpider = OOSpider.create(Site.me().setSleepTime(100), BaiduBaike.class);
        BaiduBaike baike = ooSpider.<BaiduBaike>get("http://baike.baidu.com/search/word?word=httpclient&pic=1&sug=1&enc=utf8");
        System.out.println(baike);

It will be useful for small project.