Merge pull request #58 from cs2103aug2014-w15-3J/Logic

Merge Master with Logic
added some logging for Parser, one assertion for Date class dayOfWeek() method
minor typo fixed for Date toString() and constructDate()
bug fixed for TimeTask toString method
moving "help" string into GUI:
so when the command is "help", Logic passes GUI the feedback as usual, and call UI.setHelp()
Merge pull request #61 from cs2103aug2014-w15-3J/Logic

Merge Master with Logic
Merge pull request #62 from cs2103aug2014-w15-3J/master

Merge Logic with Master