remove unwanted file from git repo after using git add . and gitignore

## I just ran into this after initializing a Visual Studio project _before_ adding a .gitignore file (like an idiot).
	## I felt real dumb commiting a bunch of files I didn't need to, so the commands below should do the trick. The first two commands
	## came from the second answer on this post: http://stackoverflow.com/questions/7527982/applying-gitignore-to-committed-files
	# See the unwanted files:
	git ls-files -ci --exclude-standard
	# Remove the unwanted files:
	git ls-files -ci --exclude-standard -z | xargs -0 git rm --cached
	# Commit changes
	git commit -am "Removed unwanted files marked in .gitignore"
	# Push reference : https://gist.github.com/jeffjohnson9046/80bc182db7ae2f4a6150