Minor refactor
Merge branch 'master' of https://github.com/cs2103aug2014-w14-1j/main
Merge branch 'master' of https://github.com/cs2103aug2014-w14-1j/main
Fixed null pointer in getDatesAsString()
Merge branch 'master' of https://github.com/cs2103aug2014-w14-1j/main
Reassign lastSearchCommand for List()