Fixed corner cases

Handling silences and last mouth shape

src/Phone.cpp

@@ -25,6 +25,7 @@ boost::bimap<string, Phone> phonesByName = makeBimap<string, Phone>({
 });
 
 Phone stringToPhone(const string& s) {
+	if (s == "SIL") return Phone::None;
 	auto it = phonesByName.left.find(s);
 	return (it != phonesByName.left.end()) ? it->second : Phone::Unknown;
 }

src/mouth_animation.cpp

@@ -1,4 +1,5 @@
 #include "mouth_animation.h"
+#include <boost/utility.hpp>
 
 using std::map;
 
@@ -69,10 +70,10 @@ Shape getShape(Phone phone) {
 map<centiseconds, Shape> animate(const map<centiseconds, Phone> &phones) {
 	map<centiseconds, Shape> shapes;
 	Shape lastShape = Shape::Invalid;
-	for (auto& pair : phones) {
-		Shape shape = getShape(pair.second);
-		if (shape != lastShape) {
-			shapes[pair.first] = shape;
+	for (auto it = phones.cbegin(); it != phones.cend(); it++) {
+		Shape shape = getShape(it->second);
+		if (shape != lastShape || next(it) == phones.cend()) {
+			shapes[it->first] = shape;
 			lastShape = shape;
 		}
 	}