VBOX: Introducing a basic graphics application for vboxwrapper based on HTML rendering. Basic plumbing is done.

TODO:
* Add vbox job elements to point to various URLs for various states. (running/suspended/not running)
* Add window timer to poll for shared memory changes
* Exit if running in screen saver mode and keyboard/mouse activity is detected.

VBOX: Juha pointed out that I took one line of code out to many on a code cleanup pass.  I'm adding it back in.

My 18 Oct 2013 commit caused the client to clear PROJECT::min_rpc_time
on startup.
This causes project-requested RPC delays to be ignored if
the client is restarted.
This is probably undesirable, so I unded that change.

Note: min_rpc_time is used for both
a) project-requested RPC delay
b) exponential backoff due to server down, not work, etc.

To me it makes sense to clear b) on restart, but not a).
Maybe at some point we should separate these.

LIB: Fix potential parser problem with applications compiled against really old BOINC API code (pre-2012).

This reverts commit 3d01d36a.

A while back I changed the job sched and work fetch policies to use
REC-based project priority.
The work fetch logic sorts the project list (in CLIENT_STATE::projects)
by descending priority.
This causes two problems:

- If you have a lot of projects, it's hard to find a particular one
  in the event log, e.g. in work_fetch_debug output.
- In the manager's Statistics tab, the selected project can change
  unexpectedly since we identify it by array index,
  and the array order may change.

Solution: sort CLIENT_STATE::projects alphabetically (case insensitive).
In WORK_FETCH, copy this array to a separate array,
that is then sorted by decreasing priority.

Mac installer: fix typos in script which builds BOINC+VBox installer, update VirtualBox version number in script.

Mac installer: name install folders with "x86_64+ instead of "i686" to show that they require a 64-bit capable Mac.  Also code sign the installer package so a lock icon appears in the installer window.

See http://boinc.berkeley.edu/trac/wiki/PrefsUnification

Discrepancies:
- "Consider the computer in use" pref isn't disabled when the two
  "suspend X when computer is in use" prefs are unset.
  Doing this would have greatly complicated things.
- day-of-week prefs aren't implemented

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