Fixed sdcard null EX
Refact readme
Update Httprequest to newest
Update version judge
Fixed Fixed Android FROYO no Build.SERIAL bug
Merge branch 'master' of https://github.com/yixia/ZI

# By Crossle Song
# Via Crossle Song
* 'master' of https://github.com/yixia/ZI:
  Fixed Fixed Android FROYO no Build.SERIAL bug
  Update version judge
  Update Httprequest to newest
  Refact readme
  Fixed sdcard null EX