build: Fixed generation when source file names contain spaces

This shouldn't happen with the source files in the repository, but
fixed the output when there are spurious files lying arou

build: Fixed generation when source file names contain spaces

This shouldn't happen with the source files in the repository, but
fixed the output when there are spurious files lying around that
contain spaces. For example "pop3 - Copy.c"

By including the offending source file in the project files the user
can then see the file and remove it if necessary.

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build: Added VC7 and VC7.1 support to the project file generator

Note: VC7.1 templates are currently not available.

build: Added VC6 and VC12 support to the project file generator

build: Added VC11 support to the project file generator

build: Added VC9 and VC10 support to the project file generator

build: Added Visual Studio project file generator

Added a batch file for generating the Visual Studio project files from
the new template files.