rviz_backdrop plugin does not load

[trainman419]

When trying to load the rviz_backdrop plugin while testing #2, I found a number of errors:

The rviz_backdrop library is not installed.

When I install it and try to load the plugin, I get a runtime link error:

rviz: symbol lookup error: /home/hendrix/indigo/rviz/install/lib//librviz_backdrop.so: undefined symbol: _ZN13rviz_backdrop15BackdropDisplay9subscribeEv

This looks like a result of a partial rewrite of the rviz_backdrop library which removed the implementation of some functions, but did not replace them.