MeshVertexColors template in X files

[leezer3]

Support for the MeshVertexColors template in .X files.
Also required (well at least declared in) by #242

Sample from a textual object:

MeshVertexColors { 
4; 
0;0.000000; 0.000000; 1.000000; 0.000000;;, 
1;0.000000; 1.000000; 1.000000; 0.000000;;,
2;0.000000; 0.000000; 1.000000; 0.000000;;, 
3;0.000000; 1.000000; 1.000000; 0.000000;;; 
} 

Specification:

• Array count
• Vertex index ==> R,G,B,A [Repeated until count]

Sample object (zipped):

rail0.zip

TODO:

• Test Loksim parser, all programs.
• Test Wavefront parser, all programs.
• Test object based backgrounds, main program.
• Compare memory usage on large NYCTA route (Should be OK now the types have been abstracted, but test)

[ci skip]

[leezer3]

e11b7f0

Some tangentially related improvements to the parser (Makes models converted to X using Open 3D Model Viewer work)

[leezer3]

Squished and FFWD to the current base.
source/ObjectViewer/RendererS.cs.orig needs removing before merge.

[leezer3]

Try again, fixed the main program and removed the junk file.....