The documentation of classes, methods and attributes were improved to make them clearer.
Many times the documentation of attributes and parameters just repeated the name of the attribute itself.
Some methods didn't have a clear explanation of their goals or lacked some important details that were included.
Some ambiguous terms such as "machine", that can mean a "virtual" or a "physical machine", where accordingly changed by the specific term to avoid confusion.
Some methods also had ambiguous meanings. Methods such as getUtilization of the UtilizationModel class return the utilization percentage of some resource. Other methods such as getUtilizationOfRam on HostDynamicWorkload class returns the absolute value of a resource usage (not percentage), what is not accordingly described in the documentation. These inconsistencies were corrected in the documentation.

Fixed test failures for LogTest class due to hardcoded decimal separator. 
Some test cases was not passing due to decimal separator was hardcoded as comma, 
instead of getting the default decimal separator configured on the system.

./finishGoogleCodeGitHubWikiMigration: Moved ProjectHome.md from wiki branch to README.md in master branch.

Probability distributions implemented in CloudSim replaced by similar functions from Apache math commons.

* Set the Java source version to 6 in the main pom.xml, for consistency

Performance improvement of the Logger. Ubiquitous string concatenation when the logger is off is now avoided.

* The minimal time between events is now configurable

Solved Issue 44: UtilizationModelPlanetLabInMemory: use a global constant to define the size of the data field: a new constructor for the classes, allowing definition of data size, was added.

Solved Issue 49: Wrong calculation of debt during migrationL: all references to debt from Datacenter and its subclasses were removed.