allow for system-wide "make install"
allow for system-wide "make install"

changed "sample/example" to "sample/btpp_example"; a "sudo make install" command (after "cmake ..") should install to /usr/local on an Ubuntu 14.04 system (/usr/local/bin/btpp_example and /usr/local/lib/libbtpp.so); see: https://cmake.org/cmake-tutorial/ and https://cmake.org/cmake/help/v3.0/command/install.html
miccol/Behavior-Tree,miccol/Behavior-Tree