Update README.txt + screenshot

README.md

@@ -81,17 +81,17 @@ In your Render function, try translating your projection matrix by (0.5f,0.5f) o
 
 <b>Can you create elaborate/serious tools with ImGui?</b>
 
-Yes. I have written data browsers, debuggers, profilers and all sort of non-trivial tools with the library. There's no reason you cannot, and in my experience the simplicity of the API is very empowering. However note that ImGui is programmer centric and the immediate-mode GUI paradigm might requires a bit of adaptation before you can realize its full potential. 
+Yes. I have written data browsers, debuggers, profilers and all sort of non-trivial tools with the library. In my experience the simplicity of the API is very empowering. However note that ImGui is programmer centric and the immediate-mode GUI paradigm might requires a bit of adaptation before you can realize its full potential. 
 
 <b>Is ImGui fast?</b>
 
-Down the fundation of its visual design, ImGui is engineered to be fairly performant both in term of CPU and GPU usage. Running elaborate code and creating elaborate UI will of course have a cost but ImGui aims to minimize it.
+Down to the fundation of its visual design, ImGui is engineered to be fairly performant both in term of CPU and GPU usage. Running elaborate code and creating elaborate UI will of course have a cost but ImGui aims to minimize it.
 
 Mileage may vary but the following screenshot may give you a rough idea of the cost of running and rendering UI code (In the case of a trivial demo application like this one, your driver/os setup may be a bottleneck and cause higher variation or throttled framerate. Testing performance as part of a real application is recommended).
 
-![performance screenshot](/web/performance_01_close_up.png?raw=true)
+![performance screenshot](/web/performance_01.png?raw=true)
 
-This is showing framerate for the full application loop on my 2011 iMac running Windows 7, OpenGL, AMD Radeon HD 6700M with an optimized executable. ([click here for the full-size picture](/web/performance_01.png)).
+This is showing framerate for the full application loop on my 2011 iMac running Windows 7, OpenGL, AMD Radeon HD 6700M with an optimized executable.
 In contrast, librairies featuring higher-quality rendering and layouting techniques may have a higher resources footprint.
 
 If you intend to display large lists of items (say, 1000+) it can be beneficial for your code to perform clipping manually - using helpers such as CalcListClipping() - in order to avoid submitting them to ImGui in the first place. Even though ImGui will discard your clipped items it still needs to calculate their size and that overhead will add up if you have thousands of items.