version bump

release 0.5.3

Update setup.py

update version

Merge branch 'deepti/restructure_downloads' into 'master'

Add model file caching; consolidate S3 URLs.

- Create a single mechanism for getting the path of a model.
- Consolidate all model S3 URLs.

Merge pull request #372 from NervanaSystems/add-non-.py-files-to-MANI…

…FEST

added absa lexicons to manifest

Peter/mkl install fix (#341)

* fix tf mkl install

Merge pull request #321 from NervanaSystems/peter/sec_fix

remove angular src for security measures

Updated README (#267)

Merge pull request IntelLabs#1 from NervanaSystems/peter/conlleval_fix

fix conlleval script