When specifying a const reference member variable in the constructor's initialization list, the argument must also be a const reference.
Make compilers happy by adding in a proper return instruction to the pycallback_object fall-through converter, even though it will never actually be issued.
Use LOG4CPP directories, not the library itself.
Fix abs block to work no matter the input type; addresses issue #660.
blocks: refactored stream_mux to be more flexible with buffer sizes
Use VERBATIM in custom commands to fix quoting, to make CMake happy with the Python command being issued
made the usage of mt19937 Boost-pre-1.47 compatible

"correct" namespace is boost::random::, but mt19937 still exists in boost::, so
fixing this was just using the same name like in the other files that use
mt19937
Merge branch 'maint'
Merge branch 'master' into next
Merge remote-tracking branch 'michaelld/fix_clang_warnings' into maint
Merge remote-tracking branch 'michaelld/fix_abs_XX' into maint
Revert "When specifying a const reference member variable in the constructor's initialization list, the argument must also be a const reference."

This reverts commit d822103336b17d40f5e93ab441e3cbf5ad000ee0.
Merge branch 'maint'
Merge branch 'master' into next
Merge remote-tracking branch 'martin/blocks/stream_mux'
Merge remote-tracking branch 'michaelld/fix_Wno_dev_warnings' into maint
Merge branch 'maint'
Merge branch 'master' into next