Update README.markdown
Removed duplicated loop.
Updating README.
Merge branch 'master' of github.com:500px/500px-iOS-api

Conflicts:
	README.markdown
Update README.markdown
Update README.markdown
added photo upload method
fixed some boundary and new line issues in the multi part request
Added uploading photo code.
Fixed typo.
Merge pull request #3 from 500px/upload

Adds Uploading to API