- **[Breaking][Fix] Allow to specify prefix for environment variable…

…s through `-envprefix` command line parameter. Default now is "CARBONAPI_" which might break some environments**

 - [Improvement] graphiteWeb function that implements force-fallback to graphtieWeb
 - [Improvement] graphiteWeb can query graphite-web 1.1.0+ for a list of supported functions and automatically do fallback to graphite in case user calls unimplemented function
 - [Improvement] New config switch to disable find request before render. This is helpful for graphite-clickhouse backends
 - [Fix] Fix typo in polyfit function description
 - [Fix] Skip metrics without pairs in reduceSeries (thx. to @errx)
 - [Fix] Fix config file parsing (thx. to @errx)
 - [Code] Move MakeResponse to expr/types and rename it to MakeMetricData. This is sometimes useful outside of tests. Thx. to @borovskyav
 - [Code] Add helper package that will ease doing per-function tests. See `expr/functions/absolute/function_test.go` for an example

v0.10.0.1

- [Fix] Autobuild scripts. Version bump to avoid retagging.

 - [Fix] `lineWidth` param is not working (thx to @lomik)

 - [Fix] Support `&` in metric name (thx to @lomik)
 - [Fix] default colors for png and svg are now defined as in graphite-web in 1.1.0, but add example of how to set them to new colors
 - [Improvement] You can override default colors through config
 - [Improvement] It's now possible to specify 'template=' option to png or svg renders. It will use templates that's specified by 'graphTemplates' option in config. Template config
format is not compatible with graphite-web though and uses either toml or yaml. Options naming is also different and follows URL override style.
 - [Code] Minor API changes in expr/png: MarshalPNGRequest and MarshalSVGRequest now requires to specify template.

Version 0.6.0

Version 0.5