Make profiling and stripping optional during compile
Also link against rospack
Implemented convenience method for adding multiple plugin search paths
Big enhancement: For every token resolution, produce multiple solutions

For some tokens, multiple values can be infered. For example, $WORKSPACE might yield several ROS workspace directories when chaining workspaces. Before, the token resolution would only consider the first path present in the environment variables, making easy usage of packages from multiple workspaces impossible. A workaround by adding all workspaces into the config.cfg file by hand solved that, but it was not very elegant and made manual labour necessary. This is now handled automatically completely.