Added vertex color attributes (currently limited to one) and UVs included for triangle mesh hair.

I have also included a small speedup for the intersection test.

intern/cycles/render/curves.h

@@ -81,6 +81,7 @@ public:
 	vector<int> curve_keynum;
 	vector<float> curve_length;
 	vector<float3> curve_uv;
+	vector<float3> curve_vcol;
 
 	vector<float3> curvekey_co;
 	vector<float> curvekey_time;