Replace Gitlab CI with Drone

.drone.yml

@@ -0,0 +1,22 @@
+kind: pipeline
+type: docker
+name: rust-stable
+
+steps:
+  - name: stable
+    image: rust:latest
+    commands:
+      - cargo build --verbose
+      - cargo test
+
+---
+kind: pipeline
+type: docker
+name: rust-nightly
+
+steps:
+  - name: nightly
+    image: rustlang/rust:nightly
+    commands:
+      - cargo build --verbose
+      - cargo test

.gitlab-ci.yml

@@ -1,14 +0,0 @@
-stages:
-  - build
-
-rust-latest:
-  stage: build
-  image: rust:latest
-  script:
-    - cargo build --verbose
-
-rust-nightly:
-  stage: build
-  image: rustlang/rust:nightly
-  script:
-    - cargo build --verbose

README.md

@@ -3,7 +3,7 @@
 [![Downloads](https://img.shields.io/crates/d/output_vt100.svg?style=flat)](https://crates.io/crates/output_vt100)
 [![MIT Licensed](https://img.shields.io/crates/l/output_vt100.svg?style=flat)](https://crates.io/crates/output_vt100)
 [![AppVeyor CI](https://img.shields.io/appveyor/ci/Phundrak/output-vt100-rs.svg?style=flat)](https://ci.appveyor.com/project/Phundrak/output-vt100-rs)
-[![pipeline status](http://labs.phundrak.fr/phundrak/output-vt100-rs/badges/master/pipeline.svg)](http://labs.phundrak.fr/phundrak/output-vt100-rs/commits/master)
+[![Build Status](https://drone.phundrak.com/api/badges/phundrak/output-vt100-rs/status.svg)](https://drone.phundrak.com/phundrak/output-vt100-rs)
 
 # Output-VT100