Organise file structure
Format syntax

The code is a syntactic mess, so I ran astyle on it to give a nice boost
to cleaning it up.
Remove user-specific configuration files
Add *.opensdf to .gitignore
Aircraft project warning fixes

All of these were improper use of enums.
Fix enum warnings in Airframe project
Fix enum warnings in Cockpit project
Update symbol enumeration method in crash handler

SymEnumerateSymbols() is deprecated- I've updated it to the newer, more
powerful SymEnumSymbols().
Fix enum warnings in Digi project
Fix enum warnings in Displays project
Fix warnings in F4Compress and Objects projects

These warnings were due to an uncasted int to float conversion and
forcing a BOOL type to a bool, respectively.
Remove obsolete code from FalcSnd project

The Talkio library was old and no longer needed.
Fix warnings in FCC project

One was an improperly called enum, the other was a very carelessly
commented out piece of code.
Remove obsolete file from HDigi project
Remove obsolete file from Helo project
Fix enum warning in ICP project
Fix enum warnings in Navaids project
Fix enum warnings in the OTWDrive project
Fix enum warnings in Radar project
Fix warnings in Rwr project

There were some enum warnings and a bit of really funky boolean logic
that needed fixing.