Fix q31_inv and q15_inv code and docs

Force remove build dir when calling configure

Add LED names to the image

Add create-app.sh script to help create new apps

Change apps' version string to "draft"

Fix float_to_q31 and float_to_q15 to full -1 to 1 range

LED pixels cleanup

Merge pull request #6 from wonkystuff/bugfix/ws2812_initialisation

Addded doxygen comment on WS2812 default constructor

Changed LED initialisation so that it happens after the clock has been set to 176MHz (otherwise bit timing is incorrect for LEDs - running at 1.1MHz not 800kHz)

Update Ubuntu requirements

Merge pull request #3 from ddf/docs/ubuntu-version-note

* fix page number of the picotool documentation.

Add Wave Bard-specific build instructions

Add Nix install method to the guide