Merge pull request #525 from collectd/feature-better-graphite-escape

Graphite deals poorly with metric names containing quotes.
redis allows passwords up to 512 characters long
memory plugin: fix submit multivalue (fill vl.type)
HTTP Digest support for curl plugins
indents
write_riemann: send notification message to riemann via description field
Merge pull request #516 from pyr/feature-normalized-cpu

Add ReportByCpu and ValuesPercentage for cpu plugin
add documentation for #516
typo in plugin descr header
Merge pull request #575 from amiron/riemann_notification_message

write_riemann: send notification message
Merge branch 'master' into production