Minor changes: Fixed issue #20, updated README

Author: Wolfgang Kastaun

ET_interface/thorns/RePrimAnd/dist/RePrimAnd.tar

@@ -11,7 +11,7 @@ Windows and AIX are not supported.
 * A C++11 capable compiler (tested with gcc and clang). 
 * Meson build system.
 * Boost library.
-* GNU Scientific Library.
+* GNU Scientific Library version >= 2.0 
 * HDF5 library (Only C-bindings required, not the C++ API).
 * Doxygen (only for documentation)
 * Sphinx with Breathe extension (only for documentation)
@@ -94,11 +94,16 @@ together with the library. The Python extension module is called
 
 ## Einstein Toolkit Support
 
-RePrimAnd does provide an (experimental) thorn that builds the library within
+RePrimAnd does provide a thorn that builds the library within
 an EinsteinToolkit (ET) environment, using the ExternalLibraries mechanism. The
 thorn can be found in the folder `ET_interface/thorns/RePrimAnd/`. The thorn
-depends on the HDF5, GSL, and BOOST ExternalLibraries thorns. In addition,
-the meson build system needs to be installed on the build host.
+depends on the HDF5, GSL, and BOOST ExternalLibraries thorns. Building it via
+the ET build system does not require meseon. Note this only builds the library,
+but not the tests and Python bindings. 
+
+The thorn is also part of the official ET framework. The version in the master 
+brach will typically by ahead of the ET version, but is not guaranteed to be 
+stable or compatible.
 
 Currently there is are no thorns that provide an ET-style interface for using
 this library, although this might change in future versions. ET Thorns can of

README.md

@@ -92,7 +92,7 @@ class units {
   }
 
   ///Compute units with G=c=1 and given density unit
-  static constexpr units geom_udensity(double udensity, 
+  static units geom_udensity(double udensity, 
                                        double g_si=G_SI)
   {
     return geom_ulength( c_SI / std::sqrt(g_si * udensity));