Add example of using RFT

Author: eivindjahren

examples/rft_example/field_properties_priors

@@ -0,0 +1,4 @@
+POROSITY UNIFORM 0.1 0.9
+X_MID_PERMEABILITY UNIFORM 0.1 0.9
+Z_MID_PERMEABILITY UNIFORM 0.1 0.9
+EQL_PRESSURE UNIFORM 4000 4800

examples/rft_example/obs.txt

@@ -0,0 +1,30 @@
+SUMMARY_OBSERVATION WOPT_2016
+{
+   VALUE = 1e7;
+   ERROR = 1e6;
+   DATE  = 2016-01-01;
+   KEY   = WOPT:PROD;
+};
+
+SUMMARY_OBSERVATION WOPT_2017
+{
+   VALUE = 2e7;
+   ERROR = 1e6;
+   DATE  = 2017-01-31;
+   KEY   = WOPT:PROD;
+};
+
+SUMMARY_OBSERVATION WOPT_2018
+{
+   VALUE = 3e7;
+   ERROR = 1e6;
+   DATE  = 2018-01-31;
+   KEY   = WOPT:PROD;
+};
+
+GENERAL_OBSERVATION PROD_PRESSURE
+{
+    DATA = PROD_RFT;
+    OBS_FILE = prod_pressure.txt;
+    RESTART = 1;
+};