Merge pull request #1 from kaiysh/master

Added Singly Linked List
Merge pull request #2 from kaiysh/master

Added Doubly Linked List and fixed Singly Linked List
Queue Rizal, yang tadi siang gak berhasil hahaha :)
Merge pull request #3 from rizalgowandy/master

Added Queue Interface (Rizal)
renamed Interface-Queue to SliceQueue
more todo(s)
fixed SliceQueue