Merge branch 'f-grpc-f-value-data-structs' into 'f-grpc-dev'

Introduce value and datatype structs to Extern C

See merge request !34

pom.xml

@@ -25,7 +25,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.caosdb</groupId>
   <artifactId>caosdb-server</artifactId>
-  <version>0.5.0-GRPC0.0.16</version>
+  <version>0.5.0-GRPC0.0.17</version>
   <packaging>jar</packaging>
   <name>CaosDB Server</name>
   <scm>