Match edit refactoring rule

[IgnatSergeev]

Modified capabilities of refactoring engine and clang-refactor tool:

• Added source location argument for clang-refactor tool
• Added corresponding source location requirement, that requests SourceLocation
• Added AST matcher(hasPointWithin), that checks that location is inside result node SourceRange
• Added AST location match requirement, that requests ast_matcher::DeclarationMatcher or StatementMatcher, SourceLocation(it is source location requirement), wrappes given matcher with hasPointWithin matcher using requested location, matches AST and provides last match result
• Added AST edit requirement, that requests and provides transformer::ASTEdit
• Added Edit Match Refactoring rule, that edits given match result with given ASTEdit