Vega Strike Code

do not symlink mesher or vssetup--that causes builds to fail on ubuntu 8.04

Now compiles with GCC 4.4 (boost 1.35 only; do not use --with-boost=system)

missions numbered instead of getting a bogus name

Fixed the variable duration of cargo scans and made sure that only vdu screens that allow NAV get automatically set to NAV when auto pilot engaged

Fixed r12564 by only writing when the file handle is ok (rather than only writing upon disk failure)...

BugFixReference: Crashes if no disk space for save under linux - ID: 2007077

Check was not done to see if it was possible to write to the file, when writing to the file. This should now prevent crashing if the file is not able to be written to, at the time the writing is performed.

Added comment defining failure condition for VSError.
Note: inconsistent checks of error condition are present. (>Ok vs <= Ok), which may cause consistency issues in the future.

String HOMESUBDIR was not defined for WIN32, but reference was made to it.
Removed nested #ifndef _WIN32 for mkdir().
Moved chdir() reference into code segment where it was defined, after mkdir().

Solves compile issue in Windows, which previously gave compiler error.

make adjust relation use the delta rather than setting the relationship to an absolute point on ship destruction

Shield Downpower attribute that redirects shield energy to recharge if power is too low for too long

DDS Cubemap loading.
Still missing a proper tie-in with Techniques, will research that a bit.

- Fixed bug in DDS loading, DDSCAPS structure was being read from the wrong offset (!)
- Made texture sides and mip count accessible to derived classes (required for DDS cubemaps)
- Background cube maps are first looked into <name>_light.texture as a DDS cubemap - if that fails, then the engine proceeds as usual.