Updated and added notebooks on simple examples from docs.

tools/Jupyter notebooks/plot_Ascan.ipynb

@@ -45,9 +45,7 @@
    ],
    "source": [
     "%matplotlib inline\n",
-    "\n",
     "import os\n",
-    "\n",
     "from gprMax.receivers import Rx\n",
     "from tools.plot_Ascan import mpl_plot\n",
     "\n",