- Updated changelog to reflect changes from 2.0 to 2.1

- Updated readme and description of the examples 

documentation/src/main/resources/changelog.txt

-This document describes modifications in the CloudSim classes from CloudSim 1.0 beta to CloudSim 2.0
+-----------------------------------------
+Changes from CloudSim 2.0 to CloudSim 2.1
+-----------------------------------------
+
+- The project has been migrated to using Apache Maven (http://maven.apache.org/). Maven simplifies
+  java project management by providing various tools and plugins for project building, testing, and 
+  packaging, dependency management, etc. 
+- The directory structure has been changed to comply with the Maven specification
+- The VmSchedulerTimeSharedWithPriority has been removed as well as the priority field from the 
+  Vm class. Users can have the same functionality by using the VmSchedulerTimeShared class and 
+  setting the MIPS requirements for VMs. See examples 2 and 3. 
+- Bug fixes, refactoring and removing obsolete code.
+
+
+----------------------------------------------
+Changes from CloudSim 1.0 beta to CloudSim 2.0
+----------------------------------------------
 
 WHAT'S NEW
 ----------

documentation/src/main/resources/examples.txt

@@ -52,11 +52,12 @@ Here is the description of what each example does:
 CloudSimExample1.java : shows how to create a datacenter with one host and run one cloudlet on it.
 
 CloudSimExample2.java : shows how to create a datacenter with one host and run two cloudlets on it.
-			The cloudlets run in VMs with different priorities.
+			The cloudlets run in VMs with the same MIPS requirements. The cloudlets will take the same 
+			time to complete the execution.
 
 CloudSimExample3.java : shows how to create a datacenter with two hosts and run two cloudlets on it.
-			The cloudlets run in VMs with different priorities. However, since each VM
-			run exclusively in each host, less priority will not delay the cloudlet on it.
+			The cloudlets run in VMs with different MIPS requirements. The cloudlets will take different 
+			time to complete the execution depending on the requested VM performance.
 
 CloudSimExample4.java : shows how to create two datacenters with one host each and run two cloudlets on them.
 

documentation/src/main/resources/readme.txt

-Directory structure of the CloudSim Toolkit
--------------------------------------------
+Table of Contents
+-----------------
+
+1. Directory structure of the CloudSim Toolkit
+2. Software requirements: Java version 1.6 or newer 
+3. Installation and running the CloudSim Toolkit
+4. Running the CloudSim examples
+5. Learning CloudSim
+6. Compiling CloudSim: using Ant
+
+
+
+1. Directory structure of the CloudSim Toolkit
+----------------------------------------------
 
 cloudsim/			-- top level CloudSim directory
 	docs/			-- CloudSim API Documentation
@@ -9,8 +21,8 @@ cloudsim/			-- top level CloudSim directory
 	tests/			-- CloudSim unit tests
 
 
-Software requirements: Java version 1.6 or newer
--------------------------------------------------
+2. Software requirements: Java version 1.6 or newer
+---------------------------------------------------
 
 CloudSim has been tested and ran on Sun's Java version 1.6.0 or newer.
 Older versions of Java are not compatible.
@@ -18,8 +30,8 @@ If you have non-Sun Java version, such as gcj or J++, they may not be compatible
 You also need to install Ant to compile CloudSim (explained in more details later).
 
 
-Installation and running the CloudSim Toolkit
------------------------------------------
+3. Installation and running the CloudSim Toolkit
+------------------------------------------------
 
 You just need to unpack the CloudSim file to install.
 If you want to remove CloudSim, then remove the whole cloudsim directory.
@@ -32,21 +44,21 @@ provided to compile and to run CloudSim applications:
   * jars/cloudsim-examples-<VERSION>-sources.jar	-- contains the CloudSim examples source code files
 
 
-Running the CloudSim examples
------------------------------
+4. Running the CloudSim examples
+--------------------------------
 
 Please read how to run the CloudSim examples in examples.txt
 
 
-Learning CloudSim
------------------
+5. Learning CloudSim
+--------------------
 
 To understand how to use CloudSim, please go through the examples provided
 in the examples/ directory.
 
 
-Compiling CloudSim: using Ant
------------------------------
+6. Compiling CloudSim: using Ant
+--------------------------------
 
 This release contains a simple buildfile for compiling CloudSim classes.
 You need to have ant installed (http://ant.apache.org/).