Fixes and clarifications from self-hosting feedback

Issues Fixed:

• Remove flask from matcher requirements and dockerfile [Resolves #404]
• use better examples
• Remove output.js [Resolves #400]
• Fix expunge script [Resolves #398]
• Add json-loader to webpack build [Resolves #397]
• use ; delimiter for ids from same source [Resolves #395]
• Remove quotes from the example .env file
• Sort results with NULLs last [Resolves #328]:

Documentation updates

Updating some of the release documentation for clarity and completeness.

Matching-Tool v1.0.0

• This is the first official release of the matching tool.