Create TaskImpl data structure

Created constructor, accessors and modifiers for Task.
Changed Iterator for Result
Implemented output for creating new task and added stubs to the rest (for walking skeleton)
added output for delete
Changed Output Interface
Added output for Welcome Message and comments for InputImpl
Define member variables
Constructor for database
Required libraries
Read the contents of the file to return a task list
Parse each line to give a task
Wrap the code in a try catch block
Write the task to the file
Merge branch 'controller/sharon'
Merge branch 'logic/wenhao'

Conflicts:
	sg/codengineers/ldo/logic/TaskImpl.java
	sg/codengineers/ldo/model/Task.java
Merge remote-tracking branch 'origin/sean-db'

Conflicts:
	sg/codengineers/ldo/db/DBConnector.java
Fixed integration issues
Merge remote-tracking branch 'origin/ui/victor'
Fixed bugs: loop, initialization
Make sure all util is available