modify the baseclass module:excel,add write and read function, data structure id a list that appends dict
from now on,we donnot need to rewrite write and read methods.of course,the data structure is as I said just now
modify the baseclass module:excel,add write and read function, data structure id a list that appends dict
from now on,we donnot need to rewrite write and read methods.of course,the data structure is as I said just now
Merge branch 'whb' of github.com:/hbnn/DataPackage into whb

Conflicts:
	baseclass/excel.py
modify excel