Update for Wowza Streaming Server 4

Added some updates for Wowza Streaming Server v4 (v4.0.4, specifically). 

* Add .gitignore with 'target/' folder ignore
* Update Wowza JARs to v4.0.4
* Update POM to use newer plugin versions, add wms.installpath property, format XML
* Changed file copy to run during 'install' Maven target instead of package to more accurately match Maven semantics.
* Update README with usage instructions

Thank you for providing this template! It saved me from a lot of frustration with the Eclipse plugin.