Function isNumber

DurationRemote/src/testApp.cpp:87–93

number test from http://stackoverflow.com/questions/4654636/how-to-determine-if-a-string-is-a-number-with-c

//number test from http://stackoverflow.com/questions/4654636/how-to-determine-if-a-string-is-a-number-with-c
bool isNumber(const string& s){
	locale loc;
	std::string::const_iterator it = s.begin();
    while (it != s.end() && (std::isdigit(*it, loc) || *it == '.' || *it == '-')) ++it;
	bool isnumber = !s.empty() && it == s.end();
    return isnumber;
}

//--------------------------------------------------------------
void testApp::guiEvent(ofxUIEventArgs &e){