fixed highlightCell scrolling bug
SLAPed InputFieldViewManager

for @acuris
more refactoring of TaskController and InputFieldViewManager
refactoring of keyword, keyworddetector, rootviewmanager and titlebarviewmanager
added my author comments for ActionController
Merge branch 'staging' of https://github.com/cs2103aug2014-w13-1c/main into jolly/gui
collated test files under src/tests
renamed isStartDateUpdated/isEndDateUpdated in commandobject
optimized more imports