*.gz makes *.tar.gz redundant

added archive extentions (lzma xz)

Global/Archives.gitignore

@@ -2,11 +2,14 @@
 # git has its own built in compression methods.
 *.7z
 *.dmg
-*.gz
-*.iso
 *.jar
 *.rar
-*.tar
-*.tar.gz
 *.zip
+*.gz
 *.bzip
+*.xz
+*.lzma
+
+#packing-only formats
+*.iso
+*.tar