added M-CHESS component
Merge branch 'develop' into m-chess_demo
Added virtual node and send_raw method to bridge between WuKong sensor
net and internet services
Add support for the master node and let the location can be saved at thne database. The datbase has been persistant at the disk now. We may need to implement functions to refresh the standard wuclass definition
Added dimmer component
Create virtual node directory.
Create MCHESS WuClass.
threshold wuclass implemented
dimmer wuclass implemented
update threshold
Basic update function for mchess.
Waiting for the api to check the links.
Merge branch 'm-chess_demo' of github.com:wukong-m2m/wukong-darjeeling into m-chess_demo
Restructured virtualNode to now using wuobjects and propagate links
Merge branch 'm-chess_demo' of https://github.com/wukong-m2m/wukong-darjeeling into m-chess_demo
Fixed errors in virtual_node wuclasses
Fix syntax error.
Change of basic data structure in master, remove of database. fix bugs due to passing reference of list as parameters to functions. Tested until step of mapping.
Merge branch 'develop' of https://github.com/wukong-m2m/wukong-darjeeling into develop

Conflicts:
	wukong/master/wkpf/mapper.py
fix typos
Change of basic data structure in master, remove of database. fix bugs due to passing reference of list as parameters to functions. Tested until step of mapping.