Updated Controller

to support timedTask with Dates on different days
Merge branch 'master' of https://github.com/cs2103aug2014-f11-1j/TaskCommander.git
Added simple search feature

search displays all the tasks containing the given words
Example command: search CS2103
Merge branch 'master' of
https://github.com/cs2103aug2014-f11-1j/TaskCommander.git