renaming the solution file
opening the solution in VS2012
fixup: post-renaming the Sprache-based tests - ignoring a failing test as depricated
trimming the trace output
partial rewrite into a simpler F# AST
can parse unrecognized global sections with a simplified AST approach
an expected error for an unrecognized global section
can parse unknown global sections and a SolutionProperties section
tweaking whitespace; all code snippets, Empty Solution, and Example00 all parse
SolutionFile is now a simplified AST node; all tests pass except the deferred visualizations of the tree
completing the transition to a simplified Discriminated Union AST