Update README.md
changes to the .gitignore file
created .gitignore to exclude files created by SS

we may want to modify in the future, but this is a start
Revert "changes to the .gitignore file"

This reverts commit 512c83c7275610c1448702a3843dbce8fd79b5b4.
expanded .gitignore created by Allan

stuff created by SS that we don't want to sync (for now at least)
a few more additions to .gitignore
Merge branch 'master' into peter

Conflicts:
	.gitignore