* fixed invalid read in SGSparseVector::sort_features(): Worked on realloc'ed memory.
* SGSparseVector::sort_features(): freeing allocated memory as soon as possible
* Introduced clone() method for SGSparseVector (similar to SGVector).  Added unit test.
SOBI changed AJD method to JADiagOrth because the time lagged matrices may not be pos def
Make LMNN implementation check training setup's arguments const
Add convergence criterion to stop LMNN training.
Merge pull request #1412 from tklein23/sparse_fixes

SGSparseVector: fixed invalid reads in sort_features() and introduce clone() method + unit test
Made refcounting in SGObject use the RefCount class
Merge pull request #1406 from van51/feature/refcount

Made refcounting in SGObject use the RefCount class
Merge pull request #1413 from pickle27/develop

SOBI changed AJD method to JADiagOrth because the time lagged matrices m...
Merge pull request #1414 from iglesias/feature/lmnn

Feature/lmnn
Find the right version of python library see issue #1407 Travis: quietly install numpy with pip on python3.3
drop eclipse files
drop eclipse settings
add build dir to git ignores