v0.8.0: Color Commentary

What's Changed

• Add theming system with built-in color themes by @jlowin in #171
• Add styling and orientation options to Slider and Progress by @jlowin in #170
• Snap slider values to step increments on initialization by @jlowin in #172
• Use Rx DSL in all documentation Python examples by @jlowin in #169
• Rx DSL docs conversion, Calendar value, Input read_only by @jlowin in #176
• Add workflow to auto-update release branch on publish by @jlowin in #181
• Rename release branch to published-docs, use force-push by @jlowin in #183
• Add Reading the Value docs section across all stateful components by @jlowin in #188
• Add line variant styling for tabs component by @jlowin in #185
• Restructure guides into Concepts section by @jlowin in #192

Full Changelog: v0.7.0...v0.8.0