add README.md
add .gitignore
append README.md
add files
add some rule
add printf_txt function
add handle video for text mode graphic
add string.h and string.c
fix include check
split kernel to string and graphic_txt
add include check include/asm_functions.h
fix Makefile
add asm files
fix itoa and printf for Negative number
change file and directory structures
fix makefiles
add Macro
fix printf
fix gitignore
add initialize pic