_Survival.c: implement __MultiEvent class.

Signed-off-by: caleb miles <caselim@gmail.com>
_Survival.c: implement test generalized ufunc

Signed-off-by: caleb miles <caselim@gmail.com>
_Survival.c: Create casting functions.

Signed-off-by: caleb miles <caselim@gmail.com>
_Survival.c module function addition.

Signed-off-by caleb miles <caselim@gmail.com>
_Survival.c : all functions work for numpy array arguments.

Signed-off-by: caleb miles <caselim@gmail.com>
_Survival.c: all functions work with list input.

Signed-off-by: caleb miles <caselim@gmail.com>
_Survival.c: valgrind fixes

Signed-off-by: caleb miles <caselim@gmail.com>
_Survival.c: formatting changes and minor fixes

Signed-off-by: caleb miles <caselim@gmail.com>