caryoscelus/rainynite-core: 2D vector animation core

caryoscelus e0b8bd872b Big header move: util		%!s(int64=6) %!d(string=hai) anos
..
CMakeLists.txt	86abc03768 Fix library install paths	%!s(int64=7) %!d(string=hai) anos
format.cpp	45c0a175d0 Put `core` ns into `rainynite` ns	%!s(int64=7) %!d(string=hai) anos
parse.cpp	e0b8bd872b Big header move: util	%!s(int64=6) %!d(string=hai) anos
time.cpp	0e98789252 Move time_period.h to period.h and related changes	%!s(int64=7) %!d(string=hai) anos