== trace ==
1. zterm.java:
   * model.autoconnect();

2. model.java
   * autoconnect();
     * connect(site, -1);
   * connect(Site site, int index);

3. Site.java
   * Class Site

4. Resource.java
   * File getRcFile()  get  .ztermrc

== modify ==
1. Site.java：encoding
2. SiteManger.java:add hadoop site