Minor updates

Added awesome-go badge.
Fixed more spelling errors across codebase.
Refactored s3.Options getClient() func to be easier to understand.

fix docs

Fixed minor doc errors and added more tests.
No functional changes.

Updated vfssimiple factory

Updated the vfssimple factory's ability to discover registered backends based on a provided URI.

v2.0.1: Merge pull request #6 from C2FO/fix_s3_option

fix s3 option bug

v2

Refactored for public release.
Now pluggable.
Simplified authentication.
Simplified vfssimple and vfscp.