readme fixes

README.md

@@ -4,7 +4,7 @@ This is a full distribution of the Plant133 plant-watering device.  This device
 
 There is a writeup of a previous version of this project at https://selectiveappeal.org/posts/plantl33/.  At some point there will be a follow-up post with a description of the current, improved system.
 
-![Plant133 device](images/scad-moisture-sensor-cap-bot.png)
+![Plant133 device](images/plant1337-box.jpg)
 
 
 ## PCBA
@@ -27,14 +27,14 @@ OpenSCAD code for the project box housing the PCBA is in the [scad/box/](scad/bo
 
 Inside the water reservoir, an insert holds a float for detecting the water level and 1-4 aquarium pumps for watering the plants.  The code for this insert is in [scad/reservoir_insert](scad/reservoir_insert).
 
-![Reservoir insert with 2 pumps](image/scad-insert-2-pumps.png)
+![Reservoir insert with 2 pumps](images/scad-insert-2-pumps.png)
 
 ### Moisture sensor cap
 
 A cap for the moisture sensor can hold the end of the watering tube in place in the plant's pot, for when the watering spike is not used.
 
-![Moisture sensor cap top](image/scad-moisture-sensor-cap-4.png)
-![Moisture sensor cap bottom](image/scad-moisture-sensor-cap-bot.png)
+![Moisture sensor cap top](images/scad-moisture-sensor-cap-4.png)
+![Moisture sensor cap bottom](images/scad-moisture-sensor-cap-bot.png)
 
 ### Watering spike