Move chart data calculation to source code edges

[valscion]

The goal of this PR was to get src/viewer.js to a place where it no longer requires any other internal module.

This PR supercedes #40 with a much less scary refactoring. The only potentially breaking change is the undocumented usage of require('webpack-bundle-analyzer').start export. As it was never part of the documented API, I thought it was safe to remove instead of figuring out how to still support it.

I moved client/ and views/ root level directories, that were only a concern for the reporter UI, inside reporter/ root level directory. This also moved the build-time UI artefacts from public/ to reporter/public/, cleaning up the root level folder structure a bit:

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I will follow-up with another PR where I will extract the src/viewer.js to a completely new package, that will be created under @webpack-bundle-analyzer npm organization, and I'll name the package as @webpack-bundle-analyzer/reporter-treemap.

This new package will be installed as a dependency of webpack-bundle-analyzer so that everything will still function as before. I want the first step of cutting out the reporter to be invisible to users of this package, so that we can release a minor version upgrade without breaking any users and have less things to worry about when the reporter package can be customized.

More on these later.

We'll figure this out later, and use a monorepo approach :)

[valscion]

Please review this @th0r soon so we won't have merge conflicts in the future. The changes in here should be safe for all the documented use cases.

[valscion]

I noticed that I had forgotten to update the files array in package.json, so the next publish would've failed.

I fixed that, and checked that the contents of npm pack look reasonable to me:

$ tar -tvf webpack-bundle-analyzer-2.8.2.tgz
-rw-r--r--  0 501    20       2429 May 27 16:27 package/package.json
-rw-r--r--  0 501    20       4235 May 26 14:14 package/README.md
-rw-r--r--  0 501    20       1093 Jan 21 21:00 package/LICENSE
-rw-r--r--  0 501    20       4129 May 27 12:54 package/CHANGELOG.md
-rw-r--r--  0 501    20       5328 May 27 16:29 package/lib/BundleAnalyzerPlugin.js
-rw-r--r--  0 501    20       3711 May 27 16:29 package/lib/Logger.js
-rw-r--r--  0 501    20       5484 May 27 16:29 package/lib/analyzer.js
-rw-r--r--  0 501    20        263 May 27 16:29 package/lib/index.js
-rw-r--r--  0 501    20       6107 May 27 16:29 package/lib/parseUtils.js
-rw-r--r--  0 501    20       8956 May 27 16:29 package/lib/tree.js
-rw-r--r--  0 501    20       4630 May 27 16:29 package/lib/viewer.js
-rwxr-xr-x  0 501    20       4414 May 27 16:29 package/lib/bin/analyzer.js
-rw-r--r--  0 501    20     176710 May 27 16:29 package/reporter/public/viewer.js
-rw-r--r--  0 501    20     726613 May 27 16:29 package/reporter/public/viewer.js.map
-rw-r--r--  0 501    20        181 May 27 16:27 package/reporter/views/script.ejs
-rw-r--r--  0 501    20        416 May 27 16:27 package/reporter/views/viewer.ejs
-rw-r--r--  0 501    20       3215 May 27 16:27 package/src/BundleAnalyzerPlugin.js
-rw-r--r--  0 501    20        938 Jan 21 21:00 package/src/Logger.js
-rw-r--r--  0 501    20       4562 May 27 12:38 package/src/analyzer.js
-rw-r--r--  0 501    20        249 May 27 12:39 package/src/index.js
-rw-r--r--  0 501    20       6313 May 26 14:14 package/src/parseUtils.js
-rw-r--r--  0 501    20       4948 May 26 14:14 package/src/tree.js
-rw-r--r--  0 501    20       3162 May 27 16:27 package/src/viewer.js
-rwxr-xr-x  0 501    20       3405 May 27 16:27 package/src/bin/analyzer.js

[valscion]

If you want only the reporter splitting, you can also just check out #82 which contains the commits in here as well. ☺️

[valscion]

I created a new major feature branch, version-3, where I intend to push pull requests one by one. I want to keep these PRs focused but to not merge to master until we think version 3 is ready.