modify Heapsort.c.

The user interface is shifted from heap to array.

Modified is the following file:

	Heapsort.c

Thank you!
							Lawrence X. Amlord
							  Apr 8th, 2014
							  Xi'an, China
clean up the remaining file of last directory reorganization.

Deleted are the following 3 files:

	Chapter_2-Getting_Started/Algorithm_Implementation/Insertion-Sort/Insertion-Sort.scm
	Chapter_2-Getting_Started/Algorithm_Implementation/Merge-Sort/Merge-Sort.scm
	Chapter_4-Divide-and-Conquer/Algorithm_Implementation/Maximum-Subarray/Maximum-Subarray.c

Thank you!
							Lawrence X. Amlord
							  Apr 8th, 2014
							  Xi'an, China