Add Text Decode + JSON Format

[callzhang]

• I'm the package's author and/or maintainer.
• I have have read the docs.
• I have tagged a release with a semver version number (v1.0.0).
• My package repo has a description and a README describing what it's for and how to use it.
• My package doesn't add context menu entries. *
• My package doesn't add key bindings. **
• Any commands are available via the command palette.
• Preferences and keybindings (if any) are listed in the menu and the command palette, and open in split view.
• If my package is a syntax it doesn't also add a color scheme. ***
• I use .gitattributes to exclude files from the package: images, test files, sublime-project/workspace. (Not
  needed for current minimal payload; can add if requested.)

My package is Sublime Text commands to auto-decode messy text (URL/HTML/unicode/hex/base64/gzip) and fix/pretty-
print JSON, with full-buffer fallback when nothing is selected.

There are no packages like it in Package Control.

[braver]

The package itself looks mostly just fine. However, you should separate your Sublime Text package from the web interface somehow. As it is, all the web stuff including the installation script will be shipped as part of your package. It probably won't do anything, but it's a little messy and might become a problem later. Perhaps these things could be different repositories altogether (I don't imagine they share much). Or you could use .gitattributes to export-ignore the web-specific bits.