add Scheme implementation of Merge-Sort.

Included is the following file:

	Merge-Sort.scm

Thank you!
							Lawrence X. Amlord
							  Apr 6th, 2014
							  Xi'an, China
Add C implementation of Maximum-Subarray.

Included is the following file:

	Maximum-Subarray.c

Thank you!
							Lawrence X. Amlord
							  Apr 7th, 2014
							  Xi'an, China