Merge pull request #1 from fei6409/jer

Heuristic fixed. with proper distance computation and return 0 when all ...
Removed debuging files and functions
Merge branch 'master' of github.com:fei6409/PDPfinal
Removed debugging function in MoveStone.cpp
minor fix
optimization
optimization
minor fix, unparallelized
add pathArray[x][y] = IDA*(...)
use Pthread to parallelize solve. But there's no result.
Reversed the original one in footnote. Still not sure why threads returns no result.
add stack[] to fit parallelization
add board[] and minor fixs
OpenMP parallelization V1.0
openmp => num_thread(30)
add Path::print()
add stop flag and special case for path len == 0
typesetting
fix MAXSTEP = 15
Added a "buggy" board?