added air.py: python script used to fetch data from AirQualityMonitor server

Signed-off-by: Wanglei <nihiue@gmail.com>
fixed character code problem.

Signed-off-by: Wanglei <nihiue@gmail.com>
added pm25in.py: fetch AQ data from pm2.5.in

Signed-off-by: Wanglei <nihiue@gmail.com>
Noting new.

Signed-off-by: Wanglei <nihiue@gmail.com>
init commit
Merge branch 'phil' of git.omnilab.sjtu.edu.cn:binzh/hackathon into zhangbin