Fixed typos

SourceFiles/Autokey.cpp

@@ -47,6 +47,7 @@ void Autokey::encodeSet(std::string key, std::string input){
 
 	//This will take a long time if the keyword in long
 	//Remove the last letter in the string until it is the same size as the input
+	//TODO: Why not just use substring?
 	while(key.size() > input.size()){
 		key.erase(key.end() - 1);
 	}

SourceFiles/Playfair.cpp

@@ -48,7 +48,7 @@ void Playfair::createGrid(){
 	bool found = false;
 	row = column = 0;
 
-	//Add any new leters from the keyword to the grid
+	//Add any new letters from the keyword to the grid
 	//If you reach row 5 then the entire grid has been filled
 	char current;
 	for(unsigned int cnt = 0;(cnt < keyword.size()) && (row < 5);++cnt){