Separate classes for groups of methods (#1)

* added resourcetype interface that's imported and reused

* added membergroupmembership; comments formatting typedoc output; updated types

* separate classes for groups of methods

* additional methods added, suggested changes made, typedoc documentation improved

documents/contributing.md

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+---
+title: Contributing
+group: Contributing
+---
+
+# Contributing
+
+## Updating Documentation
+
+Documentation is setup to be hosted on github pages, it is generated using typedoc.
+
+Typedoc documentation can be found here: <https://typedoc.org/>
+
+### Guides
+
+The files for the guides are located in the documentation folder, they are written in markdown
+
+### Module Documentation
+
+To update the typedoc generated documentation for the module, run the following commands in the root of the repo:
+
+    npm install # Install only needs to be run first time.
+    npm run docs

documents/examples.md

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+---
+title: Examples
+group: Examples
+---
+
+# Examples

documents/install.md

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+---
+title: Installing
+group: Installing
+---
+
+# Installing
+
+This library is not in NPM. As a result, you need to add it to your project and build it locally. 
+
+## Adding library source to project
+
+To do so, you have three options:
+
+- Add the repository to the consuming repository as a Git submodule.
+- Clone the repository locally.
+- Copy the files locally, without maintaining a Git repository.
+
+Regardless of which option you choose, the following steps all apply.
+
+## Building the library
+
+Enter the lib directory for the library and run the following commands:
+
+    npm install
+    npm run build
+
+## Installing the Library to Project
+
+In your project directory, run the following:
+
+    npm i /path/to/package/d4h-typescript/lib
+
+Using a relative path will also work without issue.

documents/using.md

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+---
+title: Using the Library
+group: Using
+---
+
+# Using the Library