Create %{_datarootdir}/opentsdb/plugins in rpm.

The folder %{_datarootdir}/opentsdb/plugins is required for opentsdb to
start and should be created by the rpm when installing.

Signed-off-by: Chris Larsen <clarsen@euphoriaaudio.com>
Fix CLIQuery usage command for downsampling per #314

Signed-off-by: Chris Larsen <clarsen@euphoriaaudio.com>
Change short to int in Span.java to fix precision loss and support larger
sets

Signed-off-by: Chris Larsen <clarsen@euphoriaaudio.com>
Update Thanks and News for RC3

Signed-off-by: Chris Larsen <clarsen@euphoriaaudio.com>
Merge remote-tracking branch 'remotes/official/next' into next