⚛🆙📅 Suggestion for better keybindings

[jrcharney]

There's been some changes to the keybinding syntax from .editor to atom-text-editor. So I applied some changes which may be useful for the README.md page.

## Escape Utils keymaps (I hope this works just in the text editor)
# Use this to include code examples such that
#  '<div id="something">You're</div>' becomes
#  '&lt;div id=&quot;something&quot;&gt;You&apos;re&lt;/div&gt;'
# TODO: Apply this to CSS and JavaScript, and JSON
# TODO: Consider 'escape-utils:url-[en|de]code' for 'a[href=""]'
'atom-text-editor[data-grammar="text html basic"]:not([mini])':
  'f6': 'escape-utils:html-encode-maintain-lines'
  'shift-f6': 'escape-utils:html-decode'

Another thing to think about is allowing URL encoding on attributes when applying HTML encoding on elements.