Bombadillo version 2.0.0 changelog

There were ~250 commits by three contributors and ~35 issues submitted by five
contributors.

  - Updates to README
  - Added Makefile for building
  - Added man page
  - Rebuilt the rendering engine
  - Modularized protocol support
  - Fixes issue w/ gopher type 7 responses
  - Reworked user messaging system
  - New application styling/layout
  - Added ability to see how far into a document you are
  - Expanded check command to let users check where a link goes to
  - Rewrote and simplified line wrapping
  - Improved terminal resizing responsiveness
  - Bookmarks can be scrolled when focused
  - Added gemini support
  - Improved telnet support and fixed visual bugs
  - Improved response to various signals
  - Added finger support
  - Added local files support
  - Gemini links are supported via the gophertype h URL resource format
  - Added command line flag to get version information
  - Improved/safer handling of local paths
  - Simplified file saving
  - Added validation to some option values
  - Added support for redirects in gemini
  - Added TOFU style certificate pinning system to gemini module
  - Added support and options for client certificates
  - Updated URL parsing to better support the added protocols
  - Added support for purging gemini certificates
  - Added inverse theme
  - Added defaults.go file to allow users to set defaults before building
  - Added support for http(s) through multiple terminal browser rendering
    backends
  - Updated opening http(s) links in a gui browser to do better validation of
    gui availability
  - Updated config location from ~ to XDG_CONFIG_HOME
  - Added removal of escape codes from documents to prevent pages breaking.
      Note: This is to be revisited for a future release
  - Writing files will no longer overwrite files with the same name, suffixing
    will get added
  - Removes usage of library methods only available in Go 1.12+, allowing
  - compatibility with 1.11i
  - Code formatting and linting
  - General bug fixes and performance/stability improvements