change default EchoServer port to 4444 in pset 5.

Modified is the following file:

	Assignments/Problem_Set-5/ps5/src/echo/server/EchoServer.java

Thank you!
							Lawrence X. Amlord
							  Nov. 28th, 2014
							   Xi'an, China
revise EchoServer.java and PrimeFactorEngine.java in pset 5.

This is a minor revision, only a few adjustment on naming scheme and comments.

Modified are the following 2 files:

	Assignments/Problem_Set-5/ps5/src/echo/server/EchoServer.java
	Assignments/Problem_Set-5/ps5/src/factors/engine/PrimeFactorsEngine.java

Thank you!
							Lawrence X. Amlord
							  Nov. 28th, 2014
							   Xi'an, China
add solution to Problem 3 in pset 5.

Augmented is the following file:

	Assignments/Problem_Set-5/ps5/src/factors/server/PrimeFactorsServer.java

Thank you!
							Lawrence X. Amlord
							  Nov. 28th, 2014
							   Xi'an, China