Allow [[..]] filter notation in all text panels

Based on #408 with fixed filter service method. Supports html, text and
markdown panels.
Added left and right min and max for y-axis
added nginx conf examples for graphite CORS configuration
updated nginx conf examples for graphite CORS configuration
updated nginx conf examples for graphite CORS configuration
Revert "Added left and right min and max for y-axis"

This reverts commit 8743ba2886c52e1f3faa7aba52c71bff26a6507c.
Revert "Revert "Added left and right min and max for y-axis""

This reverts commit 05303dab451df556bc1127a62f51daa7af3c1db1.
Revert "updated nginx conf examples for graphite CORS configuration"

This reverts commit 9edaa407f2444ab3bcadd1c53a8e4864bb6e97e1.
Revert "updated nginx conf examples for graphite CORS configuration"

This reverts commit be03f6adb6e2cf7ea88388f1b6f19dd301a030d4.
Revert "added nginx conf examples for graphite CORS configuration"

This reverts commit c37496f2b0d538145d81da32a84d12038a25fb3c.
Ability to set y min/max for right y-axis (RR #519, Closes #360)
Bug in when using % sign in legends (aliases), fixed by removing url decoding of metric names (Fixes #506)
prepare for master branch after all sorts of git shenanigans
Merge branch 'docs-improvement'

Added nginx config examples, including CORS header reflection.
Added nginx config examples for CORS headers, and CORS selective reflection
Merge pull request #524 from acedrew/master

Added nginx config examples to docs.
fixed column typehead, introduced in PR #500
Series names and column name typeahead cache fix (Fixes #522)
restored influxdb series naming default to series.value_func
ixed influxdb issue with raw query that caused wrong value column detection (Fixes #504)