GH-926 implement log cleaning functionality

Also adds gzip compressed log support

logic/minecraft/MinecraftInstance.cpp

@@ -5,6 +5,8 @@
 #include "Env.h"
 #include "minecraft/MinecraftVersionList.h"
 #include <MMCStrings.h>
+#include <pathmatcher/RegexpMatcher.h>
+#include <pathmatcher/MultiMatcher.h>
 
 #define IBUS "@im=ibus"
 
@@ -277,4 +279,12 @@ MessageLevel::Enum MinecraftInstance::guessLevel(const QString &line, MessageLev
 	return level;
 }
 
+IPathMatcher::Ptr MinecraftInstance::getLogFileMatcher()
+{
+	auto combined = std::make_shared<MultiMatcher>();
+	combined->add(std::make_shared<RegexpMatcher>(".*\\.log(\\.[0-9]*)?(\\.gz)?$"));
+	combined->add(std::make_shared<RegexpMatcher>("crash-.*\\.txt"));
+	return combined;
+}
+
 #include "MinecraftInstance.moc"