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.