Update README.md
initial commit of s3 funcs
Merge branch 'master' of https://github.com/imosquera/uploadthis into HEAD
filled in an empty test so as not to fail
added s3 changes
interim commit for s3 test
fixed merge issues with interim commit
minor test for s3 that checks for error
renamed file main.go to s3test.go in s3test dir
added Reader's to s3 lib wrapper
fixed import errors
merging from master