Add Gitk and Khan

[gerardroche]

Gitk

Launch gitk from within Sublime.

Khan

Add, remove, and clear rulers at the current cursor using the command palette.

• I'm the package's author and/or maintainer.
• I have have read [the docs][1].
• I have tagged a release with a [semver][2] version number.
• 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. ***
• If my package is a syntax it is named after the language it supports (without suffixes like "syntax" or "highlighting").
• I use [.gitattributes][3] to exclude files from the package: images, test files, sublime-project/workspace.

My packages are:

• Gitk: Launch gitk from within Sublime.
• Khan: Add, remove, and clear rulers at the current cursor using the command palette.

My rulers package, Kkan, is similar to others, but it should be added anyways. It is a simple, lightweight, command-palette only, package.

[packagecontrol-bot]

Automated testing result: SUCCESS

Repo links:

• Gitk
• Khan

Packages added:
  - Gitk
  - Khan

Processing package "Gitk"
  - All checks passed

Processing package "Khan"
  - All checks passed

[packagecontrol-bot]

Automated testing result: SUCCESS

Repo links:

• Gitk
• Khan

Packages added:
  - Gitk
  - Khan

Processing package "Gitk"
  - All checks passed

Processing package "Khan"
  - All checks passed

[braver]

Nice, simple, useful, good job 👍🏻