Updated Readme for starting

README.md

-# wide-angle-study
+# COMPUTER GRAPHICS FINAL PROJECT
+
+
+## wide-angle-study
 wide angle study with pbrt
+
+
+**how to start the project**
+Go into the Release directory and do
+
+
+```
+./ex2.ps1 $arg1 $arg2
+```
+For example
+
+```
+./ex2.ps1 photography ../Results/firstphoto.png
+```
+
+$arg1 is the name of the file .pbrt
+$arg2 is the output.png file location