Merge pull request nmslib#371 from nmslib/develop

Merge 0.6.2 to master

Merge pull request nmslib#367 from nmslib/develop

Update master to 0.6.1

Merge pull request nmslib#348 from nmslib/develop

0.6.0 release

Merge pull request nmslib#323 from nmslib/develop

Merge 0.5.2 changes into master

Merge pull request nmslib#279 from nmslib/develop

Merge 0.5.0 changes to master

Merge pull request nmslib#219 from nmslib/develop

Update master to 0.4.0

bump version