release/0.1.0-alpha007: Implement DAG-based enricher sorting (#31)

Motivation
----------
As our enrichers become more complicated, controlling their execution
order by priority is becoming more cumbersome. This is particularly
true if SDK consumers are trying to add additional enrichers.

Modifications
-------------
Drop the priority, and add ExecuteBefore and ExecuteAfter lists to each
enricher. These are lists of enricher types that represent dependencies
in execution order. It is similar to BeforeTargets and AfterTargets in
MSBuild.

Add EnricherSorter which analyzes the directed acyclic graph defined by
ExecuteBefore and ExecuteAfter to determine execution order.

Fixed #28

Various bug fixes

Ensure consistent header type names (#24)

Motivation
----------
There is a race condition surrounding header references with custom
schemas. If the reference in a response is processed before the header
component then incorrect type names are used.

Modifications
-------------
Add intelligence to the TypeGeneratorRegistry so it always handles
references to components as root elements, even if they are looked up
the first time using a reference to the component.

Rework the ResponseTypeGenerator to get type names from the header type
generator instead of the schema type generator.

Fixes #23

Remove leading slashes on paths

Remove leading slash for paths (#11)

Motivation
------------
Do to the specifications defined at the link below, if a leading slash is present for a path any path that was attached to the base URI is removed. This causes issues when trying to use embeded paths.

Modification
-------------
 - Added check for leading slash in schema

release/0.1.0-alpha005

Update GitHub environment take 2

release/0.1.0-alpha003

Update Readme with more instructions

release/0.1.0-alpha002

Add NuGet push to GitHub build

release/0.1.0-alpha001

Tweak to release tagging