rephrase variables explanation, remove link from workbook

Author: ewinge

Python_01_basics.ipynb

@@ -193,7 +193,8 @@
     "\n",
     "![picture of sticky notes](Alice_age.jpg)\n",
     "\n",
-    "The variable bob_age is independent from alice_age, even though it was assigned the same value. This is just the way variables are defined in Python. It would be perfectly fine to have another kind of variable where the two variables are connected, but this is not how standard python variables work."
+    "The variable bob_age is independent from alice_age, even though it was initially assigned the value from alice_age.\n",
+    "This is just the way variables are defined in Python. It would be perfectly fine to have another kind of variable where the two variables are connected, but this is not how standard python variables work."
    ]
   },
   {

Workbook.ipynb

@@ -6,9 +6,7 @@
    "source": [
     "# Python course workbook\n",
     "\n",
-    "You can [find the course material here](\n",
-    "https://scriptotek.github.io/python-novice-inflammation/index.html).\n",
-    "You can use this workbook for your own notes, and for doing the exercises."
+    "You can use this Jupyter Notebook for your own notes, and for doing the exercises."
    ]
   },
   {