Update changelog and scripts for release 0.3.0

[jleibs]

After a successful launch a couple of weeks ago, we're back with our first release!
With a few exceptions this release focuses on internal refactors & improving our processes.
However, we think you'll enjoy these goodies that made it in nonetheless!

23-03-02_18.44.38.patched.mp4

• You can now generate point clouds directly from depth textures! Check out @teh-cmc's video on how to use it.
  • This is a lot faster and more convenient than doing so manually in your own code
  • Allows to choose you from a wide variety of color maps
  • Picking is not yet working
• Python packages now work with Ubuntu-20.04 #1334
• Improve display of date-times in plots #1356
• UI scale factor is saved across sessions and more persistent between screens #1448
• SDK:
  • 2D Line strips can now be logged directly #1430
  • Add a strict mode to the Python SDK where misuses of the API results in exceptions being raised.#1477
• Showing tensors in the viewer is now faster
• Log streams / .rrd files are now versioned #1420
  • ⚠️ BREAKING: old .rrd files no longer load
• Less build dependencies (still more work to do!)
  • notably, we previously used a version of the time crate which had a security issue (CVE-2020-26235)
• Print more information & troubleshooting info on crash
• u8 segmentation stay u8 now (they converted to u16 before) #1376

---

• Windows
  • Web "runs" but still subject to Timeline view intermittently disappears on windows web-view #1195
  • Python Wheel
    • Web
    • Native
  • Rust crate
    • Web
    • Native
  • Rust install
    • Web
    • Native
• Linux
  • Python Wheel
    • Web
    • Native
  • Rust crate
    • Web
    • Native
  • Rust install
    • Web
    • Native
• Mac
  • Python Wheel
    • Web
    • Native
  • Rust crate
    • Web
    • Native
  • Rust install
    • Web
    • Native