Merge pull request #69 from COSI236TA/wenbin

Wenbin
refractor the rule controller; extract argument preparation to rule helper
Fixed turbolink error by removing random charts in home/index page
Merge pull request #70 from COSI236TA/integrate

Fixed turbolink error by removing random charts in home/index page
Merge branch 'master' of https://github.com/COSI236TA/Trade_Assistant
improve rule show; add detailed last triggered information
improve portfolio show