Update img slides

Author: stijnvanhoey

img/JakeVdP-ecosystem2.svg

@@ -139,7 +139,7 @@
 1. Make sure to (re)download ALL the course material, see [2-getting-the-course-materials](https://jorisvandenbossche.github.io/DS-python-data-analysis/setup.html#2-getting-the-course-materials) also if you already did this before.
 1. Next, also do section 3 and 4 of the [setup](https://jorisvandenbossche.github.io/DS-python-data-analysis/setup.html) instructions.
 
-> If you succesfully done 1, 2 and 3, give a 👍 `thumbs up` in the discord `#status` channel.
+> If you succesfully done 1, 2 and 3, give a 👍 `thumbs up` to the _are-you-ready_ message in the discord `#status` channel.
 
 Next:
 
@@ -177,9 +177,14 @@
 Feel free to send a discord direct message to one of us, we are stand by.
 
 ---
-class: center, middle
+class: middle, center
+
+![:scale 80%](./img/issuetracker.png)
+
+Report bugs, typo's, suggestions... as issues ([New issue](https://github.com/jorisvandenbossche/DS-python-data-analysis/issues/new)) <br>or just by mail.
+
+or see the [contributing guidelines](https://github.com/jorisvandenbossche/DS-python-data-analysis/blob/master/CONTRIBUTING.md)
 
-![:scale 100%](https://i.ytimg.com/vi/PlaYMh-u-2w/maxresdefault.jpg)
 
 ---
 
@@ -284,15 +289,6 @@
 * Introduction to Jupyter notebook/lab
 * Introduction to Pandas fundamentals
 
----
-class: middle, center
-
-![:scale 80%](./img/issuetracker.png)
-
-Report bugs, typo's, suggestions... as issues ([New issue](https://github.com/jorisvandenbossche/DS-python-data-analysis/issues/new)) or just by mail.
-
-or see the [contributing guidelines](https://github.com/jorisvandenbossche/DS-python-data-analysis/blob/master/CONTRIBUTING.md)
-
 ---
 class: middle, section_background
 
@@ -396,7 +392,7 @@
 ![:scale 100%](http://esq.h-cdn.co/assets/15/51/980x490/landscape-1450137389-john-cleese.JPG)
 
 
-### https://forms.gle/S6ZaJrabvRGpsnsRA
+### https://forms.gle/4yAv8dZxbBBpNsCK6
 
 
 Please fill in the questionnaire!