update README.md

* add explanation of naming

* add instructions for testing

* add warning to use only tagged release commits

README.md

@@ -4,7 +4,15 @@ Neggia
 XDS plugin that reads hdf5 files written by Dectris Eiger Detectors.
 Please note that a recent version of XDS (Version June 1, 2017 or later) is required for this to work.
 
-## Build
+## Naming
+
+Neggia - mountain pass in the Italian-speaking part of Switzerland pronounced "neh-jah".
+Wikipedia: https://en.wikipedia.org/wiki/Alpe_di_Neggia
+
+## Build & Test
+
+Please use only tagged release commits for your production environment.
+See https://github.com/dectris/neggia/releases
 
 ### Prerequisites
 * gcc-4.8 or higher
@@ -18,10 +26,18 @@ Please note that a recent version of XDS (Version June 1, 2017 or later) is requ
 
 ### Building
 Use cmake or cmake3, depending on what your cmake version 3 executable is called.
-* git submodule update --init
 * mkdir build
 * cd build
-* cmake ..
-* make
+* cmake .. -DCMAKE_BUILD_TYPE=Release
+* cmake --build .
+
+The plugin file is found in `build/src/dectris/neggia/plugin/dectris-neggia.so`
 
-The plugin file is found in build/src/dectris/neggia/plugin/dectris-neggia.so
+### Testing
+Use cmake or cmake3, depending on what your cmake version 3 executable is called.
+* git submodule update --init
+* mkdir build
+* cd build
+* cmake .. -DBUILD_TESTING=ON -DCMAKE_BUILD_TYPE=Debug
+* cmake --build .
+* ctest --output-on-failure