Modify the GUI for the Attach to Project Wizard for the World Community Grid
version of the client.  These changes should make clearer the difference
between attaching to a new BOINC project vs changing which applications a
user is choosing to run at World Community Grid.
Further modifications to the World Community Grid installer and skin for
BOINC 7
- Manager: fix build breaks on Win.  You can't just say "#elif".
- client: write log flags in alpha order
- client and boinccmd: update usage text
- update Unix command completion script
- update XML man pages for client, manager, boinccmd
- server: remove debugging printf from XML parser
- man page tweak