Added some test generated directories that should be ignored.
MODIFY
.gitignore
.gitignore
# Files specific to this project:
*.encrypt # Generated by one of the projects and left around on occasion.
+src/Chapter10/ProcessExitTestProgram/
+HelloWorld/
# Don't ignore DLLs in the src/Shared/Lib folder (which are frequently ignored by default in the .gitignore_global file)
!src/Shared/Lib/*

Added some test generated directories that should be ignored.