init commit for sklearn
finish Linear Regression
now make distarray is always larger than broadcast array
fix linear regression
Merge pull request #38 from EasonLiao/sklearn_lreg

finish linear regression and make broadcast array always smaller than distarray
Fix broadcasting.

The wrong dimensions were being trimmed when fetching from a
broadcast array.  If input matrices happened to be square, then
this would trigger the error.
Merge pull request #40 from spartan-array/fix_broadcast

Fix broadcasting.
Update travis to use latest Cython.
Merge pull request #41 from spartan-array/travis-ci

Update travis to use latest Cython.
Merge pull request #37 from fegin/master

Migrate extent.py to extent.pyx
Refine some test files.
  - Meaningful nameing for test cases.
  - Remove annoying messages of test_trace.py
  - test_fio_path can't pass on both single machine and clusters, comment it.