Issues compiling score

[bmmalone]

From Kari:

• There are some undefined variables in use in ad_tree.cpp and constraints.h. Perhaps these should be replaced with 'network.size()'?
• MergedTempFile.cpp needs '#include ' since std::cout is being used. Some implementations of the C++ standard library do include cout also within other headers, but this is not generally the case.
• PreviousLayerStream.cpp includes 'boost/unordered/detail/buckets.hpp' which is deprecated (i.e. not provided in the most recent Boost version). Although it seems that the whole include line can simply be removed.