add cheatsheet for subversion (svn)

cheat/cheatsheets/svn

@@ -0,0 +1,20 @@
+## update working copy from repository
+svn update "/path"
+
+## show changed files in working copy
+svn status
+
+## show what changed in local file
+svn diff "/path/filename"
+
+## add files or folders
+svn add "path/item"
+
+## revert local uncommited changes
+svn revert "/path/file"
+
+## commit changes to repo
+svn commit -m "message" "/path"
+
+## show help for 'svn diff'
+svn help diff