Merge pull request #1057 from kaos/master

panelmeta: fix metrics tab title.
SinglestatPanel: mini fix
SharePanel: fix for interval variables and auto value, Fixes #1056
Graphite: annotations stop working after recent change to millisecond resolution, Fixes #1061
SinglestatPanel: Added integration with drilldown link feature, if a drilldown link is present the entire singlestat panel will act as a link, with hover tooltip containing the link name, #951, #1041
SinglestatPanel: small fix for drilldown link click while fullscreen mode, #1041
SinglestatPanel: another small fix for drilldown link click while fullscreen mode, #1041
Graph: added export graph time series data as csv file feature, accessed from panel menu dropdown, #861
Singlestat: fixed decimal issue when value was 1, Fixes #1066
InfluxDB: fixed annotations, broken after switch to millisecond resolution, Fixes #1061
trying out panel actions buttons
Panel: fixes to panel menu when in edito/fullscreen mode, Fixes #1069
Changed version to 1.9-rc1
Updated changelog with RC1 release date
Updated changelog with share panel feature, #864, it was missing
Graph: improved decimal precision in legend and graph hover when graph ticks use single decimal point, now graph legend and tooltip always use one more decimal precision than axis ticks (if axis ticks has decimals), Fixes #1072
Singlestat: only show thresholds options when coloring option is checked, Fixes #1077
Small tweaks
Refactor timspan default in scripted examples.
Updated angular-dragdrop to fix issue with IE9, Fixes #1087