Shelving in TortoiseSVN

TortoiseSVN now has 'Shelve' and 'Unshelve' commands implemented, if you 
build it from source using the 'shelve' branch. It uses the shelving 
prototype API in Subversion's 'shelve' branch.

The purpose at this stage is to get early feedback on the Shelving 
feature from a wider range of users by presenting the shelving prototype 
in a GUI.

If you can try it, please do, and please reply with any thoughts it 
brings to mind.

The UI is very basic in the initial revision (r27987). 'Shelve' shows a 
selection list of modified files, like commit and revert do, and asks 
you to type a name. 'Unshelve' just asks you to type a name. Hopefully 
we'll get some improvements in, even before we try presenting this 
prototype to a wider range of users outside the dev-lists. For a start, 
'Unshelve' should show a list of previously shelved patches and allow 
selecting one from the list, with the most recent one chosen by default.

- Julian