add makefile for linux
Add check for windows for including windows.h
include cfloat for FLT_MAX
remove extra qualification of Manifold
ifdef windows.h only types
check for redef of apientry
change windows.h specific macros to standard typedefs
add default shape constructor for inhertiting classes to compile on clang
include GLU into it
switch clock to std::chrono
add gitinit w/ input params for cmd line, change clock to pclock to avoid collisions with time header
generalize time frequency
increase timestep accuracy, bind timestep to duration of generalized time frequency, it vorks