Merge pull request #89 from cs2103aug2014-w15-3J/Logic

Reimplemented isExpired()
Merge pull request #90 from cs2103aug2014-w15-3J/Logic

Changed simmetrics jar file. please use this version instead. Added case
construct date modified
add in indication for priority, can display very long tasks
Merge branch 'UI'
construct date test case modified
Merge pull request #91 from cs2103aug2014-w15-3J/Logic

Merge Logic with Master
Merge branch 'parser'
Parser updated:    A -t flag is required for add edit search to do nlp
Merge pull request #92 from cs2103aug2014-w15-3J/master

Merge Logic with Master