Posted version 0.99k, bug fixes and performance improvements

Version 0.99k fixes a few bugs and improves improves performance a bit for the hardware accelerated backends. It also improves compatibility with OpenDingux devices that use more recent community-made firmware. Also since the source code for all versions is uploaded with this update and the full manual is part of the OPK and accessible from the console itself, the OpenDingux-specific code is not part of the archive and the game can be distributed as an OPK file instead of a ZIP file.

Here is the list of changes:

• [All] Fix duplicate inventory entries bug
• [All] Adjust the sound effect for the step sound with a low pass filter (normally i wouldn't do that since i want to  keep the game itself as close to the jam version as possible, but the step sound effect specifically can be a bit grating after a while)
• [Direct 3D] Show dialog to run wincfg for d3d
• [Hardware 3D] Optimized animated textures in 3D hardware accelerated versions (OpenGL, D3D) to avoid sending the new frame data and instead use multiple hardware textures
• [GCW0] Use hardware surface and palette for the GCW Zero version to make it more compatible with other gaming handhelds that use OpenDingux
• [GCW0] Added Y+Right shoulder button "killswitch" in inventory screen similar to F7 for PC
• [GCW0] Added proper GCW Zero manual as part of the OPK file that is readable through the console's interface
• [Linux] Add 32bit binaries
• [All] Minor source cleanup