Add answer to Exercise_1-5

Included are the following 2 files:

	fahr-celsius_rev.c
	makefile

Thank you!
							Lawrence R. Amlord
							   Apr. 12, 2013
							   Xi'an, China
Add Practice Fahrenheit-Celsius_Table-Ver_4.

Included are the following 2 files:

	fahr-celsius-ver_4.c
	makefile

Thank you!
							Lawrence R. Amlord
							  Apr. 12, 2013
							  Xi'an, China
Add Practice File_Copying-Ver_1.

Included are the following 2 files:

	file_copying-ver_1.c
	makefile

Thank you!
							Lawrence R. Amlord
							   Apr. 12, 2013
							   Xi'an, China
Add Practice File_Copying-Ver_2.

Included are the following 2 files:

	file_copying-ver_2.c
	makefile

Thank you!
							Lawrence R. Amlord
							   Apr. 12, 2013
							   Xi'an, China