add the result_state to models
Merge branch 'production' of https://github.com/chemistryTools/ChemToolsWebService into production

Conflicts:
	calcore/models.py
add result state and solve conflict
delete piston readme
add basic framework for task details
fix calculate submit bug
add task details page
fix the task bug
Merge branch 'production' of https://github.com/chemistryTools/ChemToolsWebService into production
solve search result format
add search engine model
add save record
add search result into local database
finish task details page for search engine
fix commit in different pages
let history show by starttime order
modify single model
fix processedfile position
calculate by one task
add roll-back in suitetask save