Qcommandlineparser (#199)

* Replaced getoptplusplus with QCommandLineParser. Fixes #39

* enabling C++11 if possible

* enabling C++11 if possible

* fixed gcc compilation issues

* fixed linux builds and improved os x build

* trying to fix dispmanx

* trying to fix dispmanx

* simplified travis build script

* fixed argumentparser default values

* rewrote validator system and made sure default arguments are processed correctly

* rewrote validator system and made sure default arguments are processed correctly

* fixed bool vs. regular options

* oops... removing debug code

* reverted screenshot api change

libsrc/commandline/Parser.cpp

@@ -0,0 +1,90 @@
+#include <QtDebug>
+#include <QtGui>
+#include "commandline/Parser.h"
+
+using namespace commandline;
+
+bool Parser::parse(const QStringList &arguments)
+{
+    if (!_parser.parse(arguments)) {
+        return false;
+    }
+
+    Q_FOREACH(Option * option, _options) {
+			QString value = this->value(*option);
+			if (!option->validate(*this, value)) {
+				const QString error = option->getError();
+				if (error.size()) {
+					_errorText = tr("%1 is not a valid option for %2\n%3").arg(value, option->name(), error);
+				}
+				else {
+					_errorText = tr("%1 is not a valid option for %2").arg(value, option->name());
+				}
+				return false;
+			}
+        }
+    return true;
+}
+
+void Parser::process(const QStringList &arguments)
+{
+    _parser.process(arguments);
+    if (!parse(arguments)) {
+
+		fprintf(stdout, "%s", qPrintable(tr("Error: %1").arg(_errorText)));
+        showHelp(EXIT_FAILURE);
+    }
+}
+
+void Parser::process(const QCoreApplication &app)
+{
+    Q_UNUSED(app);
+    process(QCoreApplication::arguments());
+}
+
+QString Parser::errorText() const
+{
+    if (_errorText.size()) {
+        return _errorText;
+    }
+    else {
+        return _parser.errorText();
+    }
+}
+
+bool Parser::addOption(Option &option)
+{
+    return addOption(&option);
+}
+
+bool Parser::addOption(Option * const option)
+{
+    _options[option->name()] = option;
+    return _parser.addOption(*option);
+}
+QStringList Parser::_getNames(const char shortOption, const QString longOption)
+{
+	QStringList names;
+	if (shortOption != 0x0) {
+		names << QString(shortOption);
+	}
+	if (longOption.size()) {
+		names << longOption;
+	}
+	return names;
+}
+QString Parser::_getDescription(const QString description, const QString default_)
+{
+	/* Add the translations if available */
+	QString formattedDescription(tr(qPrintable(description)));
+
+	/* Fill in the default if needed */
+	if (default_.size()) {
+		if(!formattedDescription.contains("%1")){
+			formattedDescription += " [default: %1]";
+		}
+		formattedDescription = formattedDescription.arg(default_);
+	}
+	return formattedDescription;
+}
+