Removed ActionException and threw a BadSubcommandArgException instead
Removed unnecessary lines
Changed a few lines of ExactMatchSearcher
Merge branch 'master' of https://github.com/cs2103aug2014-t7-2/main

# By Natalie Rawle
# Via Natalie Rawle
* 'master' of https://github.com/cs2103aug2014-t7-2/main:
  Fixed autocomplete to not try to complete dates, created bug in autocompleting titles