Join license header with historical comments

[JeodC]

Description

Join the license header with historical comments using a separator so IDEs can correctly parse the initial comment. Also use .gitattributes to ensure all files are LF.

Git clone https://github.com/JeodC/Descent3/tree/joinedcomments to verify IDEs and building.

Related Issues

Resolves #100 and #129

Additional Comments

The following script was used:

Get-ChildItem -Path . -Include *.cpp,*.h -File -Recurse | ForEach-Object {
    $content = Get-Content $_.FullName
    
    if ($content[18] -eq '/*') {
        $content[16] = ""
        $content[17] = "--- HISTORICAL COMMENTS FOLLOW ---"
        $content[18] = ""
        $content | Set-Content $_.FullName
    }
}

[Lgt2x]

.gitattributes needs narrower rules. On this branch, running git add --renormalize . changes many files including .wav and other non-text files. See documentation https://git-scm.com/docs/gitattributes for more information and examples.

[JeodC]

.gitattributes needs narrower rules. On this branch, running git add --renormalize . changes many files including .wav and other non-text files. See documentation https://git-scm.com/docs/gitattributes for more information and examples.

Done. Used Get-ChildItem -File -Recurse | ForEach-Object { $_.Extension } | Sort-Object -Unique to get a list of existing filetypes.