client: if acct mgr RPC gets HTTP error, don't create a notice

Such an error typically means the acct mgr server is down.
MGR: Make the HTML page we inject notices into a valid HTML page
MGR: Do not skip an HTML link clicked event that we are also trying to veto.
web: add CPU list page
web: fixes to CPU list
web: link to CPU list from stats page
CPU list: show FLOPS per core as well as per host
CPU list: typo
CPU list: text tweak
web: show elapsed and CPU time has X hrs Y min Z sec on result page.

Not sure if we should adopt this everywhere
client & MGR: On Windows, handle expansion of environment variables in the registry value that stores DATADIR.
WINSETUP: Remove old migration (5.x->6.x) custom actions, they are not needed anymore.
file_deleter: delete gzipped versions of files also
CPU list: fix Totals row
client: begin fixing redraw bug on Windows when Options dialog is moved partly off screen and back on.

- Controls inside a wxStaticBox don't refresh properly on Windows unless they are a child of the wxStaticBox
WINBUILD: Update custom actions for the Windows Installer
WINBUILD: Remove references to boinccas95.dll, all custom actions now exist in boinccas.dll
WINBUILD: Add the revoke custom actions as well as the delete groups (boinc_admins, boinc_users, boinc_projects) and delete users (boinc_master, boinc_project) custom actions.
Merge branch 'master' of ssh://isaac.ssl.berkeley.edu/boinc-v2
WINBUILD: Add new custom actions to the uninstall execution process