In general , it is better to add -DskipTests for compile guide for av…

…oiding test cases failure

For a new user, first just want to try this project, so the compile guide doesn't need to run test cases.
by the way,  there are some test cases failed in ServiceFramework.git

docs/compile.md

@@ -5,7 +5,7 @@
 ```
 git clone https://github.com/allwefantasy/ServiceFramework.git
 cd ServiceFramework
-mvn install -Pscala-2.11 -Pjetty-9 -Pweb-include-jetty-9
+mvn install -DskipTests -Pscala-2.11 -Pjetty-9 -Pweb-include-jetty-9
 ```