Support Umbraco 8.0.0+

Full Changelog: v2.0.0...v2.1.0

Multi-targeted v8/v9 version

What's Changed

• Build Actions by @KevinJump in #1
• Add -Dialog Section and Overlay examples by @KevinJump in #6
• added editorFooter and editorHeader by @Mantus667 in #7
• Update readme.md by @LottePitcher in #19
• Dev/mutli target by @KevinJump in #9
• Adds search box for icons by @leekelleher in #20
• Icon tweaks by @leekelleher in #21
• Bits and bobs by @leekelleher in #25
• Adds alerts and notifications examples by @leekelleher in #24
• Removes "uiexamples" folder from test websites by @leekelleher in #23
• Expand contributions guidelines, and rename .Website to .v8.Website by @LottePitcher in #26
• Restructure projects, update sample sites and add CI build by @ronaldbarendse in #27
• Add publish script by @ronaldbarendse in #28

New Contributors

• @KevinJump made their first contribution in #1
• @Mantus667 made their first contribution in #7
• @LottePitcher made their first contribution in #19
• @leekelleher made their first contribution in #20
• @ronaldbarendse made their first contribution in #27

Full Changelog: ...v2.0.0