docs: update golang requirement to 1.8

CHANGELOG.md

@@ -30,6 +30,7 @@
 ## Tech
 
 * **Library Upgrade**: Upgraded angularjs from 1.5.8 to 1.6.1 [#7274](https://github.com/grafana/grafana/issues/7274)
+* **Backend**: Grafana is now built using golang 1.8
 
 ## Bugfixes
 * **Alerting**: Fixes missing support for no_data and execution error when testing alerts [#7149](https://github.com/grafana/grafana/issues/7149)

README.md

@@ -80,7 +80,7 @@ the latest master builds [here](http://grafana.org/builds)
 
 ### Dependencies
 
-- Go 1.7.3
+- Go 1.8
 - NodeJS v4+
 
 ### Get Code

appveyor.yml

@@ -7,7 +7,7 @@ clone_folder: c:\gopath\src\github.com\grafana\grafana
 environment:
   nodejs_version: "6"
   GOPATH: c:\gopath
-  GOVERSION: 1.7.4
+  GOVERSION: 1.8
 
 install:
   # install nodejs and npm

build.go

@@ -42,7 +42,7 @@ var (
 	binaries              []string = []string{"grafana-server", "grafana-cli"}
 )
 
-const minGoVersion = 1.7
+const minGoVersion = 1.8
 
 func main() {
 	log.SetOutput(os.Stdout)

docs/sources/project/building_from_source.md

@@ -13,7 +13,7 @@ dev environment. Grafana ships with its own required backend server; also comple
 
 ## Dependencies
 
-- [Go 1.7.3](https://golang.org/dl/)
+- [Go 1.8](https://golang.org/dl/)
 - [NodeJS](https://nodejs.org/download/)
 
 ## Get Code