Modify method of operations and directory layout
Add method of installation
Fix a typo
added client side tutorial.

LeoFS supports a part of Amazon S3's API and some clients can use the original target server instead of 's3.amazonaws.com', which would be available as a client against LeoFS servers.

This commit added a simple scenario for Ruby's client implementation, 'aws-s3'.
Merge pull request #3 from rakutentech/client-samples

added client side tutorial.
add tutorial for Ruby.
Merge pull request #4 from Glasssaga/tutorial_ruby

Tutorial for Ruby.
Merge Ruby's tutorials
Remove an unnecessary file which is merged s3-client
Modify documents - admin-guide, install and d3-clients
Modify a part of Gateway's install
Modify introduction and s3-api
erlang needs libncurses
Merge pull request #5 from Glasssaga/master

Erlang needs "libncurses"
bug fix
Merge pull request #6 from Glasssaga/master

Sample code doesn't works
s3-gen-key
document about bucket and auth
Merge pull request #7 from Glasssaga/develop

Document about bucket and auth
Fix wrong formats