Added support for WAV and updated README

Author: snotskie

README.md

@@ -60,4 +60,10 @@ If you have the Polynomial package installed, you can plot them directly the sam
     julia> t = TimeArray(d, rand(length(d),2), ["foo","bar"])
     julia> Plotly.plot(t)
 
-If you have the TimeSeries package installed, you can plot them directly by passing a TimeArray argument.
+If you have the TimeSeries package installed, you can plot them directly by passing a TimeArray argument.
+
+## Plot WAV Files
+    julia> using WAV
+    julia> Plotly.plot(wavread("filename.wav"))
+
+If you have the WAV package installed, you can plot WAV files by passing a call to the wavread function.

src/plot.jl

@@ -45,4 +45,15 @@ if Pkg.installed("TimeSeries") !== nothing
 		]
 		return plot([data], options)
 	end
+end
+
+if Pkg.installed("WAV") !== nothing
+	function plot{T<:Number,U<:Number,V<:Number}(wav::(Array{T,2},U,V,UnionType), options=Dict())
+		opt = merge(["layout"=>["xaxis"=>["title"=>"seconds","dtick"=>1,"tick0"=>0,"autotick"=>false]]], options)
+		w, Fs = wav
+		X = [f/Fs for f in 1.0:length(w)]
+		Y = [round(y,8) for y in w]
+		data = [["x"=>X, "y"=>Y, "type"=>"scatter", "mode"=>"lines", "name"=>"WAV data"]]
+		return plot([data], opt)
+	end
 end