Merge branch 'drone_ci' of jake/libpso into master

.drone.yml

@@ -0,0 +1,19 @@
+---
+kind: pipeline
+type: exec
+name: test libpso 
+
+platform:
+    os: linux
+    arch: amd64
+
+steps:
+- name: get rust
+  commands:
+  - rustup default nightly
+- name: cargo build
+  commands:
+  - cargo build 
+- name: cargo test
+  commands:
+  - cargo test