release v3.0 with updated config value names

What's Changed

• Update README.md by @DO1JLR in #13
• Update setup.py by @DO1JLR in #14
• update filter names by @DO1JLR in #15
• release 3.0 by @DO1JLR in #16
• update docs by @DO1JLR in #17

Full Changelog: 2.1...3.0

Improved docs

What's Changed

• improved docs by @DO1JLR in #12

Full Changelog: 2.0...2.1

[BREAKING] new filters ans sizes improved

BREAKING CHANGES

• Changed filter names
• improved lektor integration

What's Changed

• [BREAKING] Images size support for lektor.db.Images by @DO1JLR in #11

Full Changelog: 1.2...2.0

Create more modern python for srcset

Merge pull request #10 from chaos-bodensee/testing

update python testing

improved documentation

Merge pull request #8 from chaos-bodensee/docs

Improve documentation of complex example

[BREAKING] Create new, improved version of filters

Merge pull request #7 from chaos-bodensee/DO1JLR-patch-1

Update README.md

Improved docs

Added note how to install this plugin

Improved docs

Merge pull request #3 from chaos-bodensee/docs

Improve documentation

create jpgimagesizes lektor filter

Merge pull request #2 from chaos-bodensee/jpg

create jpg filter

improve documentation

This plugin now do have a better readme