Updated the readme to be more descriptive.

Updated readme; deleted old files; moved some files to the wiki.

stripped the readme down to bare bones; codalab.github.io contains the big discussion now.
Merge pull request #433 from cpoulain/master

Add API in the auth provider to resolve user names from the CLI.
Allow for larger time difference between web and storage servers
Updated Azure logo since it is now branded 'microsoft azure'.
Merge pull request #441 from cpoulain/master

Add additional means of discovering file type on file upload.
Merge pull request #442 from cpoulain/master

Add user ID to name lookup for use by CLI.
Merge pull request #439 from willum070/logo

Updated Azure logo since it is now branded 'microsoft azure'.
Merge pull request #428 from willum070/docs

Updated the readme to be more descriptive.