Junit test for autocomplete
use getMessage instead of toString
refactored code
use invalidcommandexception message
necessary comments for javadoc added
Merge branch 'sun-v0.5'
Merge remote-tracking branch 'origin/tys-ui-v0.4'
Merge remote-tracking branch 'origin/xjy-parser'
Merge branch 'master' of github.com:cs2103aug2014-w14-2j/main