Merge branch 'master' into develop
rename libxo.h to xo.h
rename libxo.h to xo.h
rename libxo.h to xo.h
rename libxo.h to xo.h
rename libxo.h to xo.h
rename libxo.h to xo.h
rename libxo.h to xo.h
rename libxo.h to xo.h
rename libxo.h to xo.h
rename libxo.h to xo.h
rename libxo.h to xo.h
Delete configure
Detect gcc (vs clang) HAVE_GCC
If we're using gcc, turn on extra CFLAGS
fix warnings under freebsd10; add xo_message functions; fix xo_depth_check
add xo_message functions
update tests
update tests
update tests