makefile works
makefile edit
constexpr algorithm.h
angle.h constexpr
makefile works

makefile edit

main testcase

main testcase
rm sublime files
to_date constexpr
greg half constexpr
remove astronomy.h
const correctness
more constexpr
Merge branch 'good_const' into refractor

Conflicts:
	calendar2013/mainfiles/cals.sublime-project
	calendar2013/mainfiles/cals.sublime-workspace
	calendar2013/mainfiles/main.cpp
	calendar2013/project_config/calendar.sublime-workspace