AssemblyContentProvider generates a RawEntity for each case in active patterns
wip
fixed: SourceCodeClassifier does not take active patterns into account as it determines if open declarations redundant or not
comment debug output
fix a comment
cleanup
add tests for SourceCodeClassifier related to active patterns
Merge pull request #719 from vasily-kirichenko/graying-out-unused-open-decls-active-patterns

Graying out unused open declarations (active patterns)