Add example of record which supports RPC and a client

Record has x and y-coordinate fields and a timestamp and also provides
a service which sets (x,y) to a sequence of values.

An RPC client application (move) sends positions as an array.

exampleRPC/iocBoot/exampleRPC/st.cmd

@@ -0,0 +1,23 @@
+< envPaths
+
+cd ${TOP}
+
+## Register all support components
+dbLoadDatabase("dbd/exampleRPC.dbd")
+exampleRPC_registerRecordDeviceDriver(pdbbase)
+
+## Load record instances
+dbLoadRecords("db/dbScalar.db","name=pvdouble,type=ao")
+dbLoadRecords("db/dbArray.db","name=pvdoubleArray,type=DOUBLE")
+dbLoadRecords("db/dbStringArray.db","name=pvstringArray")
+dbLoadRecords("db/dbEnum.db","name=pvenum")
+dbLoadRecords("db/dbCounter.db","name=pvcounter");
+
+cd ${TOP}/iocBoot/${IOC}
+iocInit()
+dbl
+epicsThreadSleep(1.0)
+exampleRPCCreateRecord mydevice
+startPVAServer
+pvdbl
+