Allow the mannwhitney buffers to be processed in reverse order
Fix NaN handling in mannwhitneyu and always return U1
Nginx error log grammar

See: https://github.com/mozilla-services/heka/issues/785
Merge pull request #23 from mozilla-services/nginx_error_grammar

Nginx error log grammar
Clear the memory limits on the sandbox during state preservation

State preservation uses the sandbox for Lua string escaping.  If
the sandbox memory usage is very close to the limit serialization
can fail.
Merge pull request #24 from mozilla-services/serialize_oom

Clear the memory limits on the sandbox during state preservation
Add MySQL slow query log decoder
https://github.com/mozilla-services/heka/issues/827
Add grammars for the Nginx upstream module

https://github.com/mozilla-services/heka/issues/776
Add upstream_cache_last_modified

Allow for empty (hyphenated) fields
Merge pull request #25 from mozilla-services/slowquery

Add MySQL slow query log decoder
Merge pull request #26 from mozilla-services/percent_f

https://github.com/mozilla-services/heka/issues/827
Merge pull request #27 from mozilla-services/issue_776

Add grammars for the Nginx upstream module
Merge remote-tracking branch 'upstream/dev' into haproxy-grammar

Conflicts:
	modules/common_log_format.lua