Merge branch 'feature-stack' into develop
update makefile
rename
add prefix to ErrType
Merge branch 'feature-utility' into develop
rename dir "include"
rm old dir
change the return type of getEntry()
Merge branch 'feature-array' into develop
change Makefile
change some return type
Merge branch 'feature-list' into develop
change the return type of push
re change return type