Update .gitignore

.gitignore

@@ -1,23 +1,55 @@
+# Rules to ignore files and folders correctly
+# NOTE: Only untracked (unversioned) files can be ignored
+# The backslash gets used for masking. E.g. \.metadata searches for the literal string ".metadata"
+# A leading "**" followed by a "/" means match in all directories. E.g. "**/test" ignores all "test" foldes in the repository.
+# A trailing "**" matches everthing inside the folder relative to the gitignore file.
+
 # Compiled class file
 *.class
 
 # Log file
 *.log
 
+# Other files
+#*.xml
+#*.txt
+*.png
+*.jpg
+*.lst
+
 # BlueJ files
 *.ctxt
 
 # Mobile Tools for Java (J2ME)
 .mtj.tmp/
 
 # Package Files #
-*.jar
+#*.jar
 *.war
 *.nar
 *.ear
 *.zip
 *.tar.gz
 *.rar
+*.7z
 
-# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+# virtual machine crash logs
 hs_err_pid*
+
+# Eclipse files
+#.project
+javadoc*
+
+# OS files
+.DS_Store*
+
+# Folders
+**/.metadata/**
+**/.settings/**
+**/.idea/**
+**/logs/**
+**/target/**
+**/bin/**
+**/classes/**
+**/RegressionTestData_Extracted/**
+**/output/**