closes #789

sanitize known issue characters from graphite tag name

closes #866
closes #482

Proper terminology and case. Exmaples for tags. Example output.

Make `go vet` happy.

replace @ character with - for librato

closes #844

This plugin is intended to add an extended support of Postgresql
compared to the legacy postgres plugin.

Basically, the plugin don’t have any metrics defined and it’s up to the
user to define it in the telegraph.conf (as a toml structure).

Each query can have it’s specific tags, and can be written specifically
using a where clause in order to eventually filter per database name.

To be more generic, a minimum postgresql version  has been defined per
query in case you have 2 different version of Postgresql running on the
same host.

This way, after a reload, the stats wont restart again at least for the
counter type.

closes #887

closes #884

fixes #890

Fix typo, should be input instead of output.

closes #849

Fixed SQL Server Plugin issues #881

Duplicated line

closes #878

closes #864
merges #880

also adding waitgroups to udp_listener and statsd plugins to verify that
all goroutines have been cleaned up before Stop() exits.

closes #869

If not, when doing reload, we may listen to the same port, we'll get
error about listen to already used address.

Add FreeBSD tarball location to README

closes #863

closes #707

Hi @sparrc

(Sorry for the noise - new pr)

closes #853

Please find some improvements to readability including the \n for the exec/telegraf line-protocol input.

I hope you (and others) find it easier to read.

/Mark

This is an ammend