algs4partI-004: collinear WIP

Compilation:  PASSED
Style:        PASSED
Findbugs:     No potential bugs found.
API:          PASSED

Correctness:  21/36 tests passed
Memory:       1/1 tests passed
Timing:       14/17 tests passed

Raw score: 68.50% [Correctness: 65%, Memory: 10%, Timing: 25%, Style: 0%]