added getter for type long 

Added getter() for type long long (long is rarely bigger than int on current architecture).

This way you can grab values > 2.147.483.647 from XML files. For example OpenStreetMaps node IDs.  
yeah no problem. the [code style](https://github.com/openframeworks/openFrameworks/wiki/oF-code-style#indentation) clarifies that we don't use whitespace to align variable declarations.