Support match lambda expr (function keyword)
Renaming
Adding documentation
Update option page
Simplify code
Finalize documentation
Fix option page behavior
Update option page

* Changed screenshot
Fix bug
Fix documentation issue
Merge pull request #466 from OkayX6/match-lambda-pattern-gen

Support match lambda expression (function keyword) & update documentation
clear FCS caches when a solution is opened
replace ProjectProvider.ReferencesChanged with a callback function
clear ProjectFactory cache on solution closing