A-vs-An wikiparser written.

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extra : convert_revision : svn%3A8b1c9e32-d664-aa4d-b30d-166127963f81/docs-trunk%403602
Update compilation of wikiparser to .net 4.5.1 (F# 4.3.1.0)
Include direct reference to EmnExtensions.
(minor)Spacing & Resharper suggestions
Minor syntax cleanups to keep up with the times (e.g. use var), explicitly add x64 build.
Include english dictionary in project, add perf. session.
Tune fuzzy text extractor.
 - Improve sentence regex to not break sentences after certain obvious acronyms
 - Tune sentence grader to be a little smarter in what it rejects.
Slightly larger buffer to smooth out concurrent perf.
Remove old regexes that are no longer used.
Minor code cleanup
Remove dependency on EmnExtensions.GetLines(), remove useless support for missing dictionary
Completely remove dependency on EmnExtensions
Split RegexTextUtils into smaller more manageable chunks.
The only reason this is one class rather than a bunch of static functionality is to work around .NET regex limitations.

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rename : WikipediaAvsAnTrieExtractor/RegexTextUtils.cs => WikipediaAvsAnTrieExtractor/Entry.cs
rename : WikipediaAvsAnTrieExtractor/RegexTextUtils.cs => WikipediaAvsAnTrieExtractor/RegexTextUtils.ExtractEnglighSentences.cs
rename : WikipediaAvsAnTrieExtractor/RegexTextUtils.cs => WikipediaAvsAnTrieExtractor/RegexTextUtils.ExtractWordsAfterAOrAn.cs
rename : WikipediaAvsAnTrieExtractor/RegexTextUtils.cs => WikipediaAvsAnTrieExtractor/RegexTextUtils.GradeEnglishSentence.cs
rename : WikipediaAvsAnTrieExtractor/RegexTextUtils.cs => WikipediaAvsAnTrieExtractor/RegexTextUtils.StripWikiMarkup.cs
Split fairly large main function (56 lines) into several helper methods; now it's 15 lines.
Simplify Main a little more; extract dictionary loading from and rename Entry=>AvsAnSighting.
Do some basic input validation and support passing wiki file and output location as command line arguments.
Remove the Experimental F# plotting projects.
Remove now unnecessary solution platforms
Don't use xml namespaces to filter, this is unreliable.
Inline trivial code.
Tune parallelism
To allow better profiling, use foreach, not linq