ONVIF java library

• Added toString() methods for easier debugging / code exploration.
• In SoapClient, added workaround for SAAJ0415: InputStream does not represent a valid SOAP 1.2 Message issue I was seeing.

This project is deeply reworked viersion of https://github.com/milg0/onvif-java-lib.

• Project is mavenized
• "Devices" entities switched to "Services" as ONVIF specifications decsribe them
• Service classes provide needed functionality, splitted according to ONVIF specifications
• Deprecated methods deleted
• Main OnvifDevice class provides access to Services (which provide main functionality) and small set of basic methods
• SOAP interaction is hidden, no direct expose, as previosly OnfifDevice provided
• Logging and Exception processing completely removed - suppose it's subject of more top-level classes where lib will be used

• WS-Discovery part!!!!
• Expansion of services functionality - up to complete ONVIF specifications functionality
• Think some refactoring still needs to be done

All subject-related notes and comments are welcome!