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.

Fixed Issue #40: Inconsistencies on the return of Cloudlet.isCloudletFinished() and the Cloudlet status.

Fixed Bug #34: Call getVm(vmId, userId) Function had swaped parameters in several parts of the Datacenter class.

Updated the javadocs, headers, code formatting, and Maven configuration (new versions of the dependencies)

want to disregard amount of MIPS required by VMs and allow oversubscription of hosts.

If more MIPS than available are required in VmSchedulerTimeShared, allocation failed by MIPS.
This does not happen in VmSchedulerTimeSharedOverSubscription.

Refactored power VM allocation policies, removed old policies, reimplemented the DVFS and single threshold policies

The power package and corresponding examples are being heavily updated, as well as new PlanetLab workload data are added. Currently, the package is not in the working state and will be fixed soon; however, the org.cloudbus.cloudsim.examples.power.random.NonPowerAware example is already working and can be run.

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- VmSchedulerTimeShared and VmSchedulerTimeSharedOverSubscription were refactored to isolate the method
that decides MIPS shares in case of oversubscription.

- CloudSimExample1 has been reverted to its original version.

Issue #8: CloudSim.terminateSimulation(long time) changed to CloudSim.terminateSimulation(double time),
to comply with clock field of CloudSim class.

maufunctions in the schedulers.

Solved issue #14: to avoid rounding problems, ResCloudlet processes length in Instructions rather than Millions of Instructions.