meta serialization bug fixes;
convenience meta query builder class MetaQuery to provide better access to json serialization.
diff --git a/pom.xml b/pom.xml
index 3017972..33c05c5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,6 +26,11 @@
<artifactId>antlr4-runtime</artifactId>
<version>4.0</version>
</dependency>
+ <dependency>
+ <groupId>com.google.guava</groupId>
+ <artifactId>guava</artifactId>
+ <version>15.0</version>
+ </dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>