Adding readme

README.md

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+Command line CardDAV CLI client.
+
+Requirements:   vdirsyncer
+
+
+Usage:
+{{{
+rpearce@crom:task_cli$ ./t.sh -h
+usage:  ./t.sh COMMAND [commandopts]
+
+               COMMAND  DESCRIPTION                               SYNONYMS
+   list [id1] .. [idX]  List [just the specified] tasks           ls,show
+             fold <id>  Fold a parent task (hide its children)    f,zc
+           unfold <id>  Unfold a parent task (show its children)  u,zo
+           toggle <id>  Fold/Unfold a parent task                 z
+         done <taskid>  Complete a task                           x,complete
+      notdone <taskid>  Uncomplete a task                         o,incomplete,uncomplete,clear
+   add [parent] <name>  Add a new task [as subtask of parent]     a,new,create
+    del [id1] .. [idX]  Delete given task(s)                      rm,delete
+               cleanup  Delete all completed tasks                clean,flush,dc
+ rename <id> <newname>  Rename given task
+             left <id>  Decrease indent of given task             h,out,up
+   right <id> <parent>  Move task below the given parent          l,mv,in
+     note <id> <notes>  Change notes for given task               desc,description,comment
+        tag <id> <tag>  Add a tag to the given task               t
+      untag <id> <tag>  Remove a tag from the given task          ut
+                  sync  Sync tasks using vdirsyncer
+             view <id>  Show detailed info for given task         v,info,vcal
+}}}