Fix functions._getPercentile by ignoring None values
Sort dashboard names in the Finder alphabetically and without case sensitivity.
Guard against bad folder permissions when walking stats directory.
Fixed graphlot metrics finder
Merge pull request #353 from lukevenediger/master

Sort dashboard names in the Finder alphabetically and without case sensitivity.
Merge pull request #385 from Silox/master

Fixed graphlot metrics finder
Merge pull request #357 from mattus/walkfix

Guard against bad folder permissions when walking stats directory.
Merge pull request #351 from fasterize/fix_getPercentile

Fix `functions._getPercentile` by ignoring None values
Merge pull request #366 from  kovyrin/path-expression-fix into 0.9.x

Make sure functions modifying time series update their pathExpression
Messaging middleware required by admin site as of 1.4
Merged newest changes from master