tar package: swap out bin/bash for /usr/bin/env bash
Merge branch 'master' of github.com:aphyr/riemann
added a standard deviation fold
ignore nil metrics
tests for mean and std-dev
Merge pull request #253 from chillitom/patch-1

added a standard deviation fold
Test case: catch Throwable, not only Exception.

Test case is following:
1. bind r.s/*exception-steam* to fn collecting exception
2. run stream where user code throws j.l.Throwable
3. check if exception was collected by *exception-stream*
Catch Throwable, not only Exception.

Catching only Exception was to narrow.

User could provide code that would result in Throwable,
like: (swap a (atom {}))

That error would go unnoticed.
Merge pull request #257 from happyhacking-nl/ex-handling

Exception handling
Added support for HipChat
Fix start-stop-daemon not working on older Debian versions
Merge pull request #258 from happyhacking-nl/hipchat

Added support for HipChat
Merge pull request #261 from bracki/start-stop-daemon

Fix start-stop-daemon not working on older Debian versions
add missing param stats to graphite-handler
Merge pull request #262 from schnipseljagd/master

add missing param stats to graphite-handler
Load defaults from /etc/default

On debian-based systems the location for default files is `/etc/default` (singular), not `/etc/defaults` (plural).
Merge pull request #265 from overthink/master

Load defaults from /etc/default
Merge branch 'master' of github.com:aphyr/riemann
index: fix a bug in expiry which broke events without ttls.
Add logstash client based on existing graphite client