Remove tests from edu\wisc\doit namespace

The tests were auto-added to the `edu\wisc\doit` namespace by IntelliJ, bundling them as a classes in our released package. Since downstream apps don't need to instantiate the tests, this removes them from the namespace.

Please review: @ahoffmann 

See merge request !5

Fix typos

`release` target will probably work better now.

Please review: @ahoffmann 

See merge request !4

Prepare project for first release

Add Composer and Phing metadata to prepare for first release.

Please review: @ahoffmann 

See merge request !3

Refactor uw-php-security to use 'Provider' classes

After a discussion about the project's design and requirements moving
forward, it was decided to refactor the project to remove
`AttributeMapper` classes and have `Provider` classes handle attribute
mapping as well as user loading. This also adds a third provider,
`PreauthHTTPUserDetailsProvider`, which can be used in environments
where Shibboleth attributes are sent as HTTP headers.

Apologies for the big PR!

Please review: @ahoffmann 

See merge request !2

After a discussion about the project's design and requirements moving
forward, it was decided to refactor the project to remove
`AttributeMapper` classes and have `Provider` classes handle attribute
mapping as well as user loading. This also adds a third provider,
`PreauthHTTPUserDetailsProvider`, which can be used in environments
where Shibboleth attributes are sent as HTTP headers.

Build improvements

Simplified build.xml to remove the self-updating of phpunit and composer. This speeds up the build. Updating can be handled by the developer as needed.

Added support for coverage reporting and SonarQube analysis.

Simplified the .gitignore file

@andrew-summers @weizhong-wang 

See merge request !1

Simplified the build.xml to remove the self-updating of phpunit and composer. This speeds up the build. Updating can be handled by the developer as needed.

Added support for coverage reporting and SonarQube analysis.

Simplified the .gitignore file