Hawkular-client

This is a fix for 0.5.4 packaging and includes the original alerts.py from 0.5.x series

Adds support for requesting multiple metric_ids from stats endpoint.

* Missing alerts package, use 0.5.5 or 0.6.0 instead

Small metrics release that allows the use of datetime and timedelta when dealing with timestamps (writing datapoints or querying for datapoints)

Adds RPM spec file to the github repository.

Metrics updates:
- Add delete_tenant
- Add create_percentiles_filter and create_tags_filter for query_metric_stats

Alerts updates:
- Fixes imports for `from hawkular import *`
- Add delete_trigger

- Fixes username/password base64 encoding when using Python 2.7
- Adds Dampening create/update/delete to Alerts API (thanks dkorn)