Further developments with PasteTool
PASTETool done without documentation
Merge branch 'master' of https://github.com/azatris/cs4218

Conflicts:
	test/sg/edu/nus/comp/cs4218/impl/extended2/PASTEToolTest.java
	test/sg/edu/nus/comp/cs4218/impl/extended2/SORTToolTest.java