Update 'README.md'

README.md

 This is the first BlueJ lab. 
 
 It has TWO BlueJ Projects in it. Both are germain to the Chapter 1 in the doc folder.
-You will follow the chapter first in `Shapes` and then in `Picture`.
+You will follow the chapter first in `Shapes` folder and then in `Picture` folder.
 
 __BUT__ you need to open these projects, NOT the ones that came with your BlueJ download. Use
 `Project -> Open Project...` to find your `dev/FirstLab-Shapes` folder. Open `Shapes` there. (and the same is
 * For the first section of the lab, open the BlueJ project file Shapes/project.bluej from Finder.
 * For the second section, use Picture/package.bluej
 
-Object of lab is to follow the chapter reading the doc folder. (and Draw a House!)
+Object of lab is to follow the chapter reading the Chapter 1 pdf in the doc folder. (and Draw a House!)
 
-Can you draw a house with a tree along side? (think `trunk` and `circle` or a tall, skunny `triangle`.
+Can you draw a house with a tree along side? (think `trunk` and `circle` or a tall, skinny `triangle`.)
+
+When finished, post a screen shot of your house to the slack chatter channel.