Fix the bug in get_client.
Fix the bug that cause timestamp in elasticsearch stuck in 1970s.
Merge pull request #12 from adieu/dev

Corrects heka-py to use nanoseconds timestamps and corrects an invalid argument used in heka.holder:get_client
* fixes testcase failure for timestamps in nanoseconds
* adds a testcase around heka.holder:get_client
Merge branch 'dev' into features/heka-stdliblogging

Conflicts:
	heka/tests/test_client.py