POS skeleton
Delete data.md
Update pos.metadata

correct words
pos matadata standard check
add test_scan_root.py. It can scan all folders and files in root diretory.Then this data structure is represented by json dictionary
finish test scan root function. use json dictionary to present files and folders structure
+ document link and document's status
Update README.md
add functions comments and dictionary descriptions
add functions comments and dictionary descriptions
add function comments and dictionary descriptions
refine posdata.py
Merge remote-tracking branch 'origin/features_pos' into features_pos

Conflicts:
	tibs/pos/posdata.py
	tibs/pos/topic.py
Merge pull request #7 from FengPu/features_pos

Features pos