* remove X-Forwarded-* headers added by nginx when proxying data source & plugin requests

* properly handle X-Forwarded-For

fixes #8446. Data with all values equal to zero, creates a max with the
value of Infinite. The for loop for creating ticks then gets stuck in an
infinite loop. This fix resets min and max and creates some fake ticks
for the y-axis if the min and max are not finite numbers.

Resolves issue #8467

fix: s3 image uploads to us-east-1 (us standard) did not return correct image urls so images shared to slack and other services was not correct, fixes #8444

Simple query editor - a text area with a Show Help section.
Validation for empty query and if the time_sec column is missing.

grafana_com: changed name of oauth grafana_net integration (old settings names still work), and updated login button look, closes #8415

remove dev.ini reference as it seems not working anymore.

Please let me know if this changed in a more recent version of Grafana, but when using 4.2.0 the manual install directions were off a little (there was no `data/plugins` directory, only a `plugins` directory).

Signed-Off-By: Joe Handzik <joseph.t.handzik@hpe.com>

* Fixed newline JSON buy in VictorOps integration

* Fixed payload sent to VictorOps so that link displays correctly

* Fixed formatted to resolve go error

* Add auto resolve incidents and image URL to VictorOps notifier

upgrade to Font Awesome 4.7.0

Proxy support added to webdav uploader, fixes #7922

docs: Added requests body for 'Password for User' and 'Permissions'

The new time ranges can also be used for time range overrides in the
override relative time field. E.g. now/M or now/y.