Ignore junks files to be added

It includes common OS junk files, some common backup and log files and
ensure that .git is ignored.

extensions/lang-english/.gitignore

@@ -0,0 +1,40 @@
+# Windows
+Thumbs.db
+ehthumbs.db
+Desktop.ini
+$RECYCLE.BIN/
+*.cab
+*.msi
+*.msm
+*.msp
+*.lnk
+
+# Mac OS
+.DS_Store
+.AppleDouble
+.LSOverride
+Icon
+._*
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+# Linux
+*~
+.directory
+.Trash-*
+
+# Backup and log files
+*.bak
+*.log
+
+# Git
+.git