Changed strings' initialisation from null to ""
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 a bug with the file reader and created the method for printing all of the tasks form a given list.
  Fixed the null case bug.
Added a check to determine if totalTaskList is null, throws an exception if it is.