Upate README and CONTRIBUTING files

* README.md: Fix links, update tagline, small fixes

* CONTRIBUTING.md: Update links, make it read better

* index.html: update links, make it read better

Don't know how this factors into issue#459

* CONTRIBUTING.md: remove errant bracket

autocomplete=none only work on input text field.
Add missing type="text" field

Fixes: https://github.com/lesspass/lesspass/issues/465

Install Jetifier tool to migrate support-library-dependent libraries to rely on the equivalent AndroidX package.

Today I updated lesspass-cli on npm to fix an old issue in the counter.
https://github.com/privacytoolsIO/privacytools.io/issues/679

Add this here for memory
I will remove the folder in anoter commit

Bumps [django](https://github.com/django/django) from 1.11 to 1.11.23.
- [Release notes](https://github.com/django/django/releases)
- [Commits](https://github.com/django/django/compare/1.11...1.11.23)

Signed-off-by: dependabot[bot] <support@github.com>

When the user open the pop up of the web extension, site field is automatically populated with the base domain name.
On site https://www.example.org/ site field become www.example.org.
Some users use example.org, some other example only, some users a custom site.

It's easy now to:
 - remove the site by hitting backspace
 - or hitting arrow down to get the first entry: example
 - or hitting arrow down x 2 to get example.org
 - or hitting tab to keep www.example.org and go on login

Fixes: https://github.com/lesspass/lesspass/issues/386
Fixes: https://github.com/lesspass/lesspass/issues/439

Fixes https://github.com/lesspass/lesspass/issues/446

Fixes https://github.com/lesspass/lesspass/issues/441

Closes #333

Fixes https://github.com/lesspass/lesspass/issues/435

Fixes: https://github.com/lesspass/lesspass/issues/430