FIX: correct include path in Quick-start guide

thanks to Raul Miguelanez

README.adoc

@@ -195,11 +195,11 @@ int main()
 }
 ----
 
-To compile and run this code for a GPU use
+To compile and run this code for a GPU use (assuming the external libraries are linked in the `include` folder as described above)
 
 [source,sh]
 ----
-nvcc -x cu -std=c++11 -Ipath/to/feltor/inc -Ipath/to/thrust/thrust -Ipath/to/cusplibrary/cusp test.cpp -o test
+nvcc -x cu -std=c++11 -Ipath/to/feltor/inc -Ipath/to/include test.cpp -o test
 ./test
 ----
 
@@ -208,7 +208,7 @@ functions you can also use
 
 [source,sh]
 ----
-g++ -std=c++11 -fopenmp -mavx -mfma -DTHRUST_DEVICE_SYSTEM=THRUST_DEVICE_SYSTEM_OMP -Ipath/to/feltor/inc -Ipath/to/thrust/thrust -Ipath/to/cusplibrary/cusp test.cpp -o test
+g++ -std=c++11 -fopenmp -mavx -mfma -DTHRUST_DEVICE_SYSTEM=THRUST_DEVICE_SYSTEM_OMP -Ipath/to/feltor/inc -Ipath/to/include test.cpp -o test
 export OMP_NUM_THREADS=4
 ./test
 ----
@@ -251,7 +251,7 @@ Compile e.g. for a hybrid MPI {plus} OpenMP hardware platform with
 
 [source,sh]
 ----
-mpic++ -std=c++11 -mavx -mfma -fopenmp -DTHRUST_DEVICE_SYSTEM=THRUST_DEVICE_SYSTEM_OMP -Ipath/to/feltor/inc -Ipath/to/thrust/thrust -Ipath/to/cusplibrary/cusp test_mpi.cpp -o test_mpi
+mpic++ -std=c++11 -mavx -mfma -fopenmp -DTHRUST_DEVICE_SYSTEM=THRUST_DEVICE_SYSTEM_OMP -Ipath/to/feltor/inc -Ipath/to/include test_mpi.cpp -o test_mpi
 export OMP_NUM_THREADS=2
 mpirun -n 4 ./test_mpi
 ----

inc/dg/blas1_t.cu

@@ -67,7 +67,7 @@ int main()
     dg::blas1::pointwiseDot( 2., w1, w2, -4., w1, w2, 0., w2);
     std::cout << "2*2*3 -4*2*3 = "<<w2[0][0]<<" (-12)\n";
     dg::blas1::axpby( 2., w1, 3., w2);
-    std::cout << "2*2+ 3*3 = " << w2[0][0] <<" (13)\n";
+    std::cout << "2*2+ 3*(-12) = " << w2[0][0] <<" (-32)\n";
     dg::blas1::axpby( 2.5, w1, 0., w2);
     std::cout << "2.5*2+ 0 = " << w2[0][0] <<" (5)\n";
     dg::blas1::axpbypgz( 2.5, w1, 2., w2, -0.125, w3);