[doc] Improve documentation

Author: g3force

README.md

@@ -14,16 +14,15 @@ If you just want to use this app, simply download the latest [release binary](ht
 
 ### Requirements
 You need to install following dependencies first: 
- * Go
+ * Go >= 1.9
  * NPM
 
 ### Prepare
 Download and install to [GOPATH](https://github.com/golang/go/wiki/GOPATH):
 ```bash
 go get -u github.com/RoboCup-SSL/ssl-game-controller/...
 ```
-Switch to checked-out repo
-Install
+Switch to project root directory
 ```bash
 cd $GOPATH/src/github.com/RoboCup-SSL/ssl-game-controller/
 ```
@@ -45,7 +44,7 @@ npm run serve
 ```
 Or use the provided IntelliJ run configurations.
 
-### Build self-containing release binary
+### Build self-contained release binary
 First, build the UI resources
 ```bash
 # compile and minify UI