add suffix array
remove the lib
add sa
uploading
Remved sa
add sa

add sa]
sa added
sa_gpu speed up
speed up to deal with data as large as 100MB
updated suffix_array from Owensgroup_suffix_array
Creating git submodules of cub and mgpu
Merge pull request #134 from edmundyan/suffix_array

Creating git submodules of cub and mgpu
add suffix array to cudppPlan, instead of malloc memory in each recursive iteration, malloc one whole piece of memory in CUDPPSkewPlan and access based on certain pattern
compiled and tested SA
Removing cmake files from repo.
added some files for skew
delete some files
ScanInc added
test code added
Fixing the submodules url.  Should work for https clones now.