Revise .gitignore.

							Lawrence R. Amlord
							   Apr. 7, 2013
							   Xi'an, China
Add Factorial-Linear_Recursion_Version.scm

This example is simple but it is worthwhile to write down the code
down here for a better understanding.

Thank you!
						Lawrence R. Amlord
						   Apr. 7, 2013
						   Xi'an, China
Add Factorial-Linear_Iteration_Version.scm

It is not easy to come up with iterative tactics for this problem.
Therefore, procedures here might not seem as concise as that of re-
cursion strategy.

This implementation of computing factorials by means of iteration
consists of seperate procedures.

Thank you!
						Lawrence R. Amlord
						   Apr. 7, 2013
						   Xi'an, China
Add Factorial-Linear_Iteration_Version(Block_Structure).scm

This implementation of computing factorials by means of iteration
group the procedures in a block structure.

Note that the procudure here is exactly the same as that in
'Factorial-Linear_Iteration_Version.scm' except for their present-
ing styles.

Thank you!
						Lawrence R. Amlord
						   Apr. 7, 2013
						   Xi'an, China
Rename Exercises_in_the_Textbook -> Chapter_1