updates readme and travis

.travis/run_tests.sh

@@ -330,6 +330,7 @@ if [ "$TESTCOV" == "1" ] && [ "$TESTID" == "0" ]; then
   cd EXAMPLES/homogeneous_acoustic/
   cp -v DATA/Par_file DATA/Par_file.org
   sed -i "s:^NSTEP .*:NSTEP    = 5:" DATA/Par_file
+  sed -i "s:300:5:" run_this_example_kernel.sh
   sed -i "s:^t_start.*:t_start=-6.0:" create_adjoint_sources.sh
   sed -i "s:^t_end.*:t_end=-5.55:" create_adjoint_sources.sh
   ./run_this_example_kernel.sh

README.md

@@ -8,6 +8,7 @@ It can, for instance, model seismic waves propagating in sedimentary basins or a
 SPECFEM3D was founded by Dimitri Komatitsch and Jeroen Tromp, and is now being developed by a large, collaborative, and inclusive community. A complete list of authors can be found at
 https://specfem3d.readthedocs.io/en/latest/authors/
 
+
 ## Installation
 
 Instructions on how to install and use SPECFEM3D are
@@ -18,6 +19,19 @@ available in the
 - HTML manual (latest version): [specfem3d.readthedocs.io](http://specfem3d.readthedocs.io/)
 
 
+For a quick test, run the default example with these commands:
+```
+./configure FC=gfortran CC=gcc
+make all
+./run_this_example.sh
+```
+and check the output files in `./OUTPUT_FILES/`
+
+>__NOTE__: Do not modify the 'configure' script directly. Please modify the
+    'configure.ac' file instead, and generate a new 'configure' script with
+    the command: `autoreconf -i`
+
+
 ## Development
 
 [![Actions Status](https://github.com/SPECFEM/specfem3d/workflows/CI/badge.svg)](https://github.com/SPECFEM/specfem3d/actions)
@@ -47,12 +61,3 @@ involved in the community and keep them in the specfem3d github wiki:
 
 SPECFEM3D is part of the software that is hosted by the Computational Infrastructure for Geodynamics (CIG). It is available on the CIG website [here (SPECFEM3D)](https://geodynamics.org/resources/specfem3dcartesian).
 
-___
-
-### Do not modify configure script
-
-Never modify the "configure" script directly, it is better to modify the "configure.ac" file and then generate the "configure" script by typing:
-
-```
-autoreconf -i
-```