commit after verifying that this tutorial runs

Author: kbarnhart

lithology/introduction_to_lithology.ipynb

@@ -475,9 +475,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "metadata": {
-    "collapsed": true
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "imshow_grid(mg, 'K_sp')"
@@ -567,9 +565,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "metadata": {
-    "collapsed": true
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "print(ds)"
@@ -587,9 +583,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "metadata": {
-    "collapsed": true
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "ds.topographic__elevation"
@@ -639,9 +633,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "metadata": {
-    "collapsed": true
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "imshow_grid(mg, 'topographic__elevation', cmap='viridis')"
@@ -661,9 +653,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "metadata": {
-    "collapsed": true
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "hvds_topo = hv.Dataset(ds.topographic__elevation)\n",
@@ -683,9 +673,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "metadata": {
-    "collapsed": true
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "%opts Image style(interpolation='bilinear', cmap='viridis') plot[colorbar=True]\n",
@@ -805,9 +793,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "metadata": {
-    "collapsed": true
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "imshow_grid(mg2, 'topographic__elevation', cmap='viridis')"
@@ -825,9 +811,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "metadata": {
-    "collapsed": true
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "volcanic_deposits = np.zeros(mg2.size('node'))\n",
@@ -883,7 +867,6 @@
    "cell_type": "code",
    "execution_count": null,
    "metadata": {
-    "collapsed": true,
     "scrolled": true
    },
    "outputs": [],