Added .gitignore

  On branch master
	new file:   .gitignore

Signed-off-by: Kerwin Hui <kerwinhui@users.noreply.github.com>
Added source files

  On branch master
	new file:   Doxyfile
	new file:   Makefile
	new file:   calendar.cc
	new file:   date.cc
	new file:   include/beautyexception.h
	new file:   include/calendar.h
	new file:   include/date.h
	new file:   include/debug.h
	new file:   include/exception.h
	new file:   main.cc
	new file:   pubhol.dat
	new file:   solar.dat

Signed-off-by: Kerwin Hui <kerwinhui@users.noreply.github.com>