added 'go get' command & build instructions (#16) (#19)

Signed-off-by: Andreas Ulm <[email protected]>

Author: root360-AndreasUlm

README.md

@@ -7,6 +7,7 @@ the Gitea API implementation.
 Currently no prebuilt binaries are provided.
 To install, a Go installation is needed.
 ```sh
+go get code.gitea.io/tea
 go install code.gitea.io/tea
 ```
 
@@ -30,6 +31,15 @@ tea releases
 
 > If you are inside a git repository hosted on a gitea instance, you don't need to specify the `--login` and `--repo` flags!
 
+## Compilation
+
+To compile the sources yourself run the following:
+```sh
+go get code.gitea.io/tea
+cd "${GOPATH}/src/code.gitea.io/tea"
+go build
+```
+
 ## Contributing
 
 Fork -> Patch -> Push -> Pull Request