Release 0.11.2

Just a minor bugfix release. Changes are:

- Switched to using official version of [drmaa-python](https://github.com/drmaa-python/drmaa-python), because it is now up-to-date on PyPI.
- Added .gitatttributes file to keep line endings normalized.
- Fixed issue where jobs that exceed resubmission limit would infinitely send error reports.
- We now check to see if the DRMAA C library was imported correctly and switch to local mode if it wasn't, instead of just crashing (#19).
- Switch to using psutil for process CPU and memory stats (#18).