Storage Commit : Added retrive(search) functions

Edits: StorageTask.java
	- Added overloaded functions 
	 - retrievedStoredTasks(long queryDate)
	 - retrievedStoredTasks(String querylabel)
Storage Commit : Added search API functions for Logic in StorageMain
	Logic can now search tasks by calling searchTask &
	indicating true/false in the function parameter follow by placing 
	in the query data

Edits: StorageMain.java
	Added:
	 - searchTask(boolean byDate, boolean byLabel, String... queryParams)
Storage Commit : Added examples of search API functions from storage for
easy implementation by logic.

Edits: Main.java
	Added:
	 - Demo for searching task by date 
	   look for //Test for search task by date
	 - Demo for searching task by label 
	   look for //Test for search task by label