Restart development

After a period of inactivity, this commit starts active development up
again.  Most of the changes are centered around working in IDEA,
copyrights, and formatting.
Rename test files

In an attempt to slim down the POM file, I removed some custom
configuration of the Maven surefire plugin.  This causes the custom-
named tests to not run.  This change updates the names of the tests to
be standard.
Use password instead of passphrase

Previously, the aws-maven wagon used the username and passphrase
facilities in the wagon API to contribute credentials.  At some point,
the implementation of the API changed such that it was no longer
possible to use that pairing together.  This change updates the wagon
to use username and password now, which can be used together.

[#14]
Merge branch 'jmena-master'
Java 7 minimum

Since Java 6 does not have the proper CAs to handle S3's SSL
certificates, there's no longer any need to support Java 6.  This
change updates the minimum supported Java to Java 7.
Do not set ACL

Previously, the ACL of each artifact and directory was set explicitly
without the ability to override it.  This caused problems in certain
environments and wasn't wanted any longer in the 5.x line.  This
change removes that explicit configuration in lieu of using bucket
policies.

[Completes #6][Completes #8]
Credential Provider Chain

This change adds support for a CredentialProviderChain.  This enables
a tiered lookup of credential locations.

[Complete #9]
[artifactory-release] Next development version
Added Amazon IAM section in the README.md
Merge branch 'after-the-sunrise-master'
Update README to describe public s3 bucket policy

The automatic setting of a public-read ACL for each artifact is
removed in: https://github.com/spring-projects/aws-
maven/commit/2ece0db9b0f381a8800441e9c64b8fcb72d0415e

If somebody needs the old behaviour, needs to set a bucket policy. The
provided script automates the process. see issues:

* https://github.com/spring-projects/aws-maven/issues/6
* https://github.com/spring-projects/aws-maven/issues/8
* https://github.com/spring-projects/aws-maven/issues/19

[resolves #20]
Merge branch 'lalyos-patch-1'