Updated sonar-scanner

Updated docs & code to drone 1.0 syntax

Dockerfile

@@ -1,13 +1,13 @@
 FROM openjdk:8-jre-alpine
-
+RUN apk add --no-cache --update nodejs
 COPY drone-sonar /bin/
-COPY lib/sonar-scanner-cli-3.2.0.1227.zip /bin
+COPY lib/sonar-scanner-cli-3.3.0.1492.zip /bin
 
 WORKDIR /bin
+RUN unzip sonar-scanner-cli-3.3.0.1492.zip \
+  && mv sonar-scanner-3.3.0.1492 sonar-scanner \
+  && rm -rf sonar-scanner-cli-3.3.0.1492.zip
 
-RUN unzip sonar-scanner-cli-3.2.0.1227.zip \
-    && rm sonar-scanner-cli-3.2.0.1227.zip
-
-ENV PATH $PATH:/bin/sonar-scanner-3.2.0.1227/bin
+ENV PATH $PATH:/bin/sonar-scanner/bin
 
 ENTRYPOINT /bin/drone-sonar