Add Implementation of Example: Set as unordered lists.

Included are the following 2 files:

	Set-Unordered_Lists.scm
	Test_for_Set-Unordered_Lists.scm

Thank you!
							Lawrence R. Amlord
							   Jul 19th, 2013
							   Xi'an, China
Add my answer to Exercise 2.59.

Included are the following 4 files:

	Exercise_2.59.pdf
	Exercise_2.59.scm
	Exercise_2.59.tm
	Test_for_Exercise_2.59.scm

Thank you!
							Lawrence R. Amlord
							   Jul 19th, 2013
							   Xi'an, China