Add keywords and include with rest of library

Audio.h

@@ -80,6 +80,7 @@
 #include "effect_delay_ext.h"
 #include "effect_midside.h"
 #include "effect_reverb.h"
+#include "effect_waveshaper.h"
 #include "filter_biquad.h"
 #include "filter_fir.h"
 #include "filter_variable.h"

keywords.txt

@@ -36,6 +36,7 @@ AudioEffectDelayExternal	KEYWORD2
 AudioEffectBitcrusher	KEYWORD2
 AudioEffectReverb	KEYWORD2
 AudioEffectMidSide	KEYWORD2
+AudioEffectWaveshaper	KEYWORD2
 AudioFilterBiquad	KEYWORD2
 AudioFilterFIR	KEYWORD2
 AudioFilterStateVariable	KEYWORD2
@@ -154,6 +155,7 @@ encode	KEYWORD2
 decode	KEYWORD2
 secondMix	KEYWORD2
 pitchMod	KEYWORD2
+shape	KEYWORD2
 
 AudioMemoryUsage	KEYWORD2
 AudioMemoryUsageMax	KEYWORD2