refactored package name for processes.

Conflicts:
	src/main/java/be/kuleuven/cs/flexsim/domain/site/Site.java
	src/main/java/be/kuleuven/cs/flexsim/domain/site/SiteImpl.java
	src/test/java/be/kuleuven/cs/flexsim/domain/site/SiteTest.java
Refactored deprecated creation methods in process.