use the lexer to do colorization more accurately
add SourceCodeClassifier test for F# namespaces
LanguageService does not create getLexerSymbol function
update FCS to 0.0.40

fix the issue with colorizing F# namespaces
fix invalid coloring of double quoted methods
Merge pull request #219 from vasily-kirichenko/use-lexer-in-colorizer

Use the lexer to do colorization more accurately