implemented function to read tasks from file
created method to determine task type.
edited add function to add tasks according to task type
improved view method
Merge branch 'master' of https://github.com/cs2103aug2014-t17-2J/main

Conflicts:
	WeDo/LogFile.txt
populate lists by retrieving from text file
edited write to file function so that three lists will be written as one json object
Merge branch 'master' of https://github.com/cs2103aug2014-t17-2J/main

Conflicts:
	WeDo/LogFile.txt