Improve deploy task to deploy apps to configDropins/overrides as server.xml entries

[MisaelSalcido]

Issue resolved: #2

The deploy task can now specify whether deploy to the dropins folder or configDropins/overrides folder as an xml file named appName.extension.xml. This file will have an application tag with the name and location of the file deployed. To undeploy applications, it just deletes this file.

Changes to UndeployTask:

• If it is undeploying an xml file, change the location to configDropins/overrides and add the .xml extension.

Changes to DeployTask:

• Created a method for deploy to dropins (deployToDropins) and deploy to xml file (deployToXml)
• Created a method to check the deployment of apps.

Changes to README:

• Added the parameters deployTo to deploy task and from to undeploy task.
• Updated the description and examples of both deploy and undeploy tasks.