This update adds a feature that I'm calling "colonist commentary" to the game. The idea is that instead of a tutorial, your first colonist will explain what needs to be done. Then your colonists will continue to guide you through the game by making suggestions, telling you what they're thinking or feeling, or just making random comments which may or may not be relevant.

Full changelog as follows:

New Features
- New UI Feature: Colonist commentary bar and comment archive dialog. About 250 comments added so far.
- One new music track: "Xeno Tranquility" by Dominik Scholz. Thanks to the composer for this!

Updates
- Redesigned the toolbar at the bottom of the screen
- New button to open the mothership dialog, with a progress bar and current status
- The hints panel has been removed, the commentary replaces this
- The various event popups at the bottom of the screen have also been removed
- The construct button and the resource processor button are highlighted at the start of the game, then the deconstruct button
- Biomass power plant can now be used to burn excess mush
- Roofs no-longer cost any stone to build
- Reduced energy cost of environment control to 8kWh
- New names for all plants and animals. May be subject to change - still not sure if I like them!
- Added descriptions to the UI for all plants.
- Reduced mothership "recharge" time by 20%
- Colonist won't go for a walk in hour one (annoying when they wander off at right the start!)
- Tables are now treated as circular (corner-cutting allowed) rather than square for pathfinding
- Walls and doors can now be constructed from six adjacent tiles instead of just two
- Modified the logic behind "can't find water", "can't find food", and "idle" warnings, to reduce false hits
- Opening any dialog will now cause all side panels to close (just looks better this way with the transparent UI)
- Added some text on inventory item tooltips, want to make it clearer that you can put stuff on the ground
- Updated the soil synthesiser description
- Scrollbar up/down buttons are now visibly enabled/disabled as appropriate, also shaded the slider to make it a little more visible
- No special artwork for this version so reverted to the v0.1 menu screen background with the lander for now

Fixes
- Fixed problem that stopped some types of plant - most notably bluefruit - from growing correctly
- Fixed flickering shadows (actually rewrote a lot of the shadow renderer code, should now be a bit more efficient too)
- Fixed (mostly) a pathfinding issue that could cause a colonist to stop and backtrack when cutting corners
- Fixed a situation that could cause a colonist to get stuck
- Fixed an error that could occasionally get logged by the colonist pathfinding code
- Fixed a glitch on the plant and rock panel
- Fixed construction hint incorrectly saying that a wall would block access in a certain situation
- Fixed bug that an area would remain lit after deconstructing a lamp
- Colonist status effects now always hidden when colonist dies
- Sound and music players should now stop if errors are detected, rather than crashing the whole game

Existing saved games should continue to work after this update.