Changes

Bug 1188: Cleanup public/private[reconfig, non-reconfig] state bits

- STATE_BIT_FULLSCREEN_SPAN is private and used for reconfigure,
  hence STATE_BIT_COUNT_RECONFIG is needed.

- STATE_BIT_FULLSCREEN_SPAN is added at the end of public state bits

- PSTATE_BIT_MINMAXSIZE_SET is unused.

Improves a bit the documentation of ImageType and adds .ico and .cur into it

Improves a bit the documentation of ImageType

HowtoBuild: Update Debian 8.1.0 package recipe ..

Bug 1196: Fix Unresolved strncpy_s (MSVCRT) on WinXP

Unresolved strncpy_s (MSVCRT) on WinXP,
as shown w/ dependency walker (red module, red unresolved line).

Mapped: _tcsncpy_s -> strncpy_s (!UNICODE).
On WinXP MSVCRT has no strncpy_s.
  _tcsncpy_s(sOut, sOutLen, s, len)
  -> bound-check + _tcsncpy(sOut, s, len)

Bump oculusvr-sdk

Bug 1188: Refine reconfig state bits

Bug 1188: Introduce getSupportedStateMask() implemented via WindowDriver's getSupportedReconfigMaskImpl()

- See getSupportedStateMask() for semantics
- getSupportedReconfigMaskImpl() result now used for isReconfigureMaskSupported()
- getSupportedReconfigMaskImpl() implementations:
  - Full featured: X11, Windows and OSX
  - X11: Use WindowManager Atoms for certain features (dynamic)
  - Others: Use fixed features.

- TODO: Consider avoiding actions if not supported.