data: Added HeaderSearchPaths to Application- and ProjectSettings

This change allows for parsing of a real codebase by specifying the system header search paths in
ApplicationSettings.xml and the additional header search paths in ProjectSettings.xml.

Both settings files are now documented in ApplicationSettings_template.xml and ProjectSettings_template.xml, which show
all possible settings for each file.

This change also fixes some parsing edge cases that occured.

src/lib/Settings.cpp

@@ -3,6 +3,7 @@
 #include "utility/FileSystem.h"
 #include "utility/logging/logging.h"
 #include "utility/text/TextAccess.h"
+#include "utility/utilityString.h"
 
 Settings::Settings()
 {
@@ -44,3 +45,16 @@ void Settings::clear()
 {
 	m_config = ConfigManager::createEmpty();
 }
+
+std::vector<std::string> Settings::getValues(const std::string& key, std::string defaultValue) const
+{
+	std::string value = getValue<std::string>(key, defaultValue);
+
+	if (value.size())
+	{
+		std::deque<std::string> values = utility::split(value, '|');
+		return std::vector<std::string>(values.begin(), values.end());
+	}
+
+	return std::vector<std::string>();
+}