Add descriptions to all projects with README files

These show up in the project manager when hovering over projects.

audio/bpm_sync/project.godot

@@ -16,6 +16,7 @@ _global_script_class_icons={
 [application]
 
 config/name="BPM Sync Demo"
+config/description="A demo of how to sync the audio playback with the time for a consistent BPM."
 run/main_scene="res://bpm_sync.tscn"
 config/icon="res://icon.png"
 

audio/device_changer/project.godot

@@ -16,6 +16,7 @@ _global_script_class_icons={
 [application]
 
 config/name="Audio Device Changer Demo"
+config/description="This is a demo showing how the audio output device can be changed from Godot."
 run/main_scene="res://Changer.tscn"
 config/icon="res://icon.png"
 

audio/generator/project.godot

@@ -16,6 +16,9 @@ _global_script_class_icons={
 [application]
 
 config/name="Audio Generator Demo"
+config/description="This is a demo showing how one can generate and
+play audio samples from GDScript.
+It plays a simple 440 Hz sine wave at 22050 Hz."
 run/main_scene="res://generator.tscn"
 
 [rendering]

audio/mic_record/project.godot

@@ -16,6 +16,8 @@ _global_script_class_icons={
 [application]
 
 config/name="Audio Mic Record Demo"
+config/description="This is an example showing how one can record audio from
+the microphone and later play it back or save it to a file."
 run/main_scene="res://MicRecord.tscn"
 config/icon="res://icon.png"
 

audio/spectrum/README.md

@@ -1,7 +1,6 @@
 # Audio Spectrum
 
-This is a demo showing how a spectrum analyzer
-can be built using Godot.
+This is a demo showing how a spectrum analyzer can be built using Godot.
 
 Language: GDScript
 

audio/spectrum/project.godot

@@ -16,6 +16,7 @@ _global_script_class_icons={
 [application]
 
 config/name="Audio Spectrum Demo"
+config/description="This is a demo showing how a spectrum analyzer can be built using Godot."
 run/main_scene="res://show_spectrum.tscn"
 config/icon="res://icon.png"