Added rips-zigzag; in the process caught a number of bugs in ZigzagPersistence (added check_consistency() to it)
set (targets
avida-distance
avida-rips-distance
#avida-landscape
)
foreach (t ${targets})
add_executable (${t} ${t}.cpp)
target_link_libraries (${t} ${libraries} ${Boost_PROGRAM_OPTIONS_LIBRARY})
endforeach (t ${targets})